<PAGE>

                                                             Exhibit 10.13

                                                             CONFIDENTIAL
                                                             TREATMENT REQUESTED


                       FIRST AMENDMENT TO SUPPLY CONTRACT

This Amendment (this "Amendment") is made as of February 1,2004 and shall amend
a certain Supply Contract (the "Supply Contract") dated January 1, 2003 between
Viasystems, Inc., a Delaware corporation ("Buyer") and International Wire Group,
Inc. a Delaware corporation ("IWG" or "Seller").

                                   WITNESSETH:

WHEREAS, the Buyer and IWG have agreed to amend certain portions of the Supply
Contract as stated herein;

WHEREAS, the Buyer and IWG wish to memorialize the amendment to the Supply
Contract pursuant to the terms of this Amendment.

NOW THEREFORE, in consideration of the forgoing, the representations and
agreements hereinafter set forth and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Seller and the
Buyer hereby mutually agree to amend the Supply Contract as follows:

1) Section 2.1 shall be deleted in its entirety and shall be replaced with the
following:

         2.1      The terms and conditions of this Supply Contract shall govern
                  the purchase by Buyer from Seller of Wire, including the part
                  numbers and specifications of which are listed on Schedule A
                  hereto which is, by this reference, incorporated herein, as
                  amended from time to time (hereinafter "Retained Product(s)"),
                  together with all Wire that is not a Retained Product,
                  including Wire which results from a redesign, modification or
                  enhancement of a Retained Product (the "Developed
                  Product(s)"), and all other Wire that is purchased by Buyer,
                  including those part numbers and specifications of which are
                  listed on Schedule B hereto which is, by this reference,
                  incorporated herein, as amended from time to time (hereinafter
                  "Additional Product(s)" and, together with the Retained
                  Products and Developed Products, the "Products(s)"). In the
                  event that there are Developed Products which Buyer desires to
                  purchase for the present business conducted by Buyer (the
                  "Present Business"), Buyer shall give reasonably sufficient
                  advance notice of its requirements for such Developed Products
                  to Seller so that Seller can produce in a commercially
                  reasonable time period a written production plan to
                  demonstrate Seller's ability to supply such Developed Products
                  for the Present Business. In the event that Seller can
                  reasonably demonstrate to Buyer its ability to supply such
                  Developed Products for the Present Business, the Developed
                  Products will be included in this Supply Contract as Retained
                  Products and an initial price shall be established for such
                  Developed Product, in writing, by the parties hereto. The
                  parties shall establish such price based on a comparative
                  analysis for such Developed Products, including without
                  limitation, reference to the current prices charged hereunder
                  for a Retained Product similar in design or application to the
                  Developed Products with


                                       1


<PAGE>
                  due consideration to any change in cost associated with the
                  materials used in the Developed Products in relation the
                  Retained Product and any development cost associated with
                  such Developed Product; provided however such prices shall
                  not exceed prices based on competitive quotes.

2) Section 3.1 of the Supply Contract shall be deleted in its entirety and shall
replaced with the following:

         3.1      Except as otherwise provided herein, during the Initial Term
                  and any Option Term of this Supply Contract, (a) Buyer agrees
                  to purchase a certain percentage of Buyer's requirements in
                  North America and Mexico of each of the Retained Products or
                  any Developed Products, as such percentages existed for the
                  year 2003 according to the calculable allocation set forth in
                  Exhibit I to Schedule A attached hereto, provided Seller meets
                  Buyer's required delivery schedules and quality requirements
                  as set forth herein; and (b) IWG agrees to sell to Buyer
                  Additional Products at Buyer's request upon receipt and
                  confirmation of a purchase order for such Additional Products
                  up to and until June 30, 2004, provided that Buyer provides to
                  Seller on a weekly basis Buyer's binding 6 week forecast (the
                  "6 Week Forecast") of requirements for such Additional
                  Products, which such 6 Week Forecast shall have a minimum
                  order requirement for each week that Buyer commits to purchase
                  Additional Products of no less than 1,750,000 feet of those
                  Additional Products marked as "Silicones" on Schedule B, and
                  450,000 feet of those Additional Products listed as "Cords" on
                  Schedule B.

3) Section 3.3 of the Supply Contract shall be deleted in its entirety and shall
be replaced with the following:

         3.3      Any Retained Products or Developed Products purchased from an
                  alternate manufacturer for any of its locations for
                  development and testing proposes only shall not be included in
                  the calculation of the percentage of such product purchased by
                  Buyer for purposes of Section 3.1 hereof, provided that such
                  Retained Products or Developed Products are not used in
                  Buyer's business for commercial resale.

4) Section 4.1 of the Supply Contract shall be deleted in its entirety and shall
be replaced with the following:

         4.1      Unless otherwise agreed to by the parties in writing, all
                  amounts invoiced and payable under this Supply Contract shall
                  be paid in U.S. dollars and all amounts shall be due and
                  payable by wire transfer of immediately available funds with
                  payment terms of: [*]

                  [*]


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.

<PAGE>
                  [*]

5) Section 5.1 of the Supply Contract shall be deleted in its entirety and shall
be replaced with the following:

         5.1      The parties agree to incorporate into this Supply Contract the
                  provisions in Schedule C -- Material Supply / Inventory
                  Agreement.

                              VIASYSTEMS, INC.



                              By: /s/ JOSEPH S. CATANZARO
                                  --------------------------------------------
                              Name: Joseph S. Catanzaro
                                    ------------------------------------------
                              Title: Senior Vice President
                                     -----------------------------------------



                              INTERNATIONAL WIRE GROUP, INC.



                              By: /s/ JOSEPH M. FIAMINGO
                                  --------------------------------------------
                              Name: Joseph M. Fiamingo
                                    ------------------------------------------
                              Title: Chief Executive Officer
                                     -----------------------------------------


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>

                                                                      SCHEDULE A

INTERNATIONAL WIRE GROUP                                          DATE: 02/02/04
INSULATED WIRE DIVISION                                     IWGID RFQ #: 0312071
TELEPHONE #: 1-800-736-9473                                             REV 1
PRICE QUOTATION                                   PLEASE REFERENCE THIS RFQ #
                                               WHEN YOU PLACE YOUR FIRST ORDER!
PREPARED FOR:
    VIASYSTEMS
    EL PASO, TX

<Table>
<Caption>
                                                                     CURRENT                        2004 QUOTE
 IWG PART                                              VOLUME         WEIGHT                        PRICE PER
  NUMBER             PRODUCT DESCRIPTION                (MFT)        PER MFT        LEAD TIME      MFT @ $1.00
----------        -----------------------------       ---------      --------       ---------      -----------
<S>               <C>                                 <C>            <C>            <C>            <C>
502E730001        20/1 UL3173 10/30 B.031 125C           [*]           [*]             [*]             [*]
522E531001        12/1 UL3173 65/30 B.031 125C           [*]           [*]             [*]             [*]
522EB31001        12/1 UL3173 19/0185 B.031 125          [*]           [*]             [*]             [*]
542E430005        14/1 UL3173 19/0147 B.031 125          [*]           [*]             [*]             [*]
542E831001        14/1 UL3173 41/30 BC.031 125C          [*]           [*]             [*]             [*]
552E830001        10/1 UL3173 19/0234 B.031 125          [*]           [*]             [*]             [*]
552E930001        10/1 UL3173 105/30 B.031 125C          [*]           [*]             [*]             [*]
562E530004        16/1 UL3173 26/30 BC.031 125C          [*]           [*]             [*]             [*]
572E132008        22/1 UL3173 7/30 B.031 125C            [*]           [*]             [*]             [*]
582E230001        18/1 UL3173 16/30 BC.031 125C          [*]           [*]             [*]             [*]
582EF31010        18/1 UL3173 16/30 TPCT 125C            [*]           [*]             [*]             [*]
507E820001        20/1 UL3321 10/30 T.031 150C           [*]           [*]             [*]             [*]
527E430001        12/1 UL3321 19/0185 T.031 150          [*]           [*]             [*]             [*]
547E520001        14/1 UL3321 19/0147T.030 150C          [*]           [*]             [*]             [*]
557E231001        14/1 UL3321 19/0234 T.031 150          [*]           [*]             [*]             [*]
567E720001        16/1 UL3321 26/30 TC.031 150C          [*]           [*]             [*]             [*]
577E620001        22/1 UL3321 7/30 T 031 150C            [*]           [*]             [*]             [*]
587EB20001        18/1 UL3321 16/30 TC 030 150C          [*]           [*]             [*]             [*]
                                                         [*]
</Table>

LEAD TIME:      [*]

COPPER
BASE:           QUOTED @ $1.00 COMEX

FREIGHT
TERMS:          FREIGHT COLLECT DURANGO, MEXICO

PAYMENT
TERMS:          [*]

INSIDE SALES
REP:            MONICA COFFMAN

ACCOUNT
MANAGER:        DAVID PASCUAL

EXPIRATION
DATE:           30 DAYS FROM DATE OF ISSUE

** PART NUMBERS PROVIDED ON QUOTES ARE FOR IWG INTERNAL PURPOSES ONLY.
   SPECIFIC PART NUMBERS MUST BE DETERMINED AT TIME OF ORDER.

THANK YOU FOR THE OPPORTUNITY TO QUOTE YOUR WIRE REQUIREMENTS.

PREPARED BY IWGID SALES DEPARTMENT: RS


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>
                                                                      SCHEDULE A

INTERNATIONAL WIRE GROUP                                          DATE: 02/02/04
INSULATED WIRE DIVISION                                     IWGID RFQ #: 0312071
TELEPHONE #: 1-800-736-9473
PRICE QUOTATION                                                         REV 1
PREPARED FOR:                                     PLEASE REFERENCE THIS RFQ #
    VIASYSTEMS                                  WHEN YOU PLACE YOUR FIRST ORDER!
    EL PASO, TX

<Table>
<Caption>
                                                                          STANDARD
                                                               COPPER      PACKAGE                      2003 PRICE     2004 QUOTE
                                                    VOLUME     WEIGHT   (Inches unless                   PER MFT @     PRICE PER
IWG PART NUMBER        PRODUCT DESCRIPTION           (MFT)     PER MFT  otherwise noted)   LEAD TIME       $1.00      MFT @ $1.00
---------------   ------------------------------  ---------   --------  ----------------   ---------    ----------   -------------
<S>               <C>                             <C>         <C>       <C>                <C>          <C>          <C>
1415311001GE      14/1 AWM 19/01 47 B 5/64 105C      [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1615011001GE      16/1 AWM 26/30 B 4/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1622018010GE      16/1 AWM DOUBLE INSULATED 105C     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1822018001GE      18/1 AWM DOUBLE INSULATED 105C     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
18230P1103GE      18/1 AWM DOUBLE INSULATED 105C     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
484E220014        18/1 UL1056/1275 16/30 B 4/54      [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1803110010GE      18/1 TEW 7x59/44 B 2/64 105C       [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2202518001GE      22/1 TEW 7/30 T 2/64 105C          [*]         [*]      35 Gal Drum         [*]           [*]           [*]
402E730010        20/1 TEW 10/30 B 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
442E831001        14/1 TEW 41/30 B 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
452E31017         16/1 TEW 65/34 B 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
462E430001        16/1 TEW SOLID B 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
462E631001        16/1 TEW 26/30 B 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
462E731028        16/1 TEW 26/30 T 2/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
48ZEZ41001        18/1 UL 1043/1015 16/30 B 2/64     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
48ZE322001        18/1 TEW 41/34 BC 2/64 105C        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1811011019GE      18/1 AWM 16/30 B UL1061 80C        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1816817001GE      18/1 AWM 19/0093 TVL1651 80C       [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2216517001GE      22/1 AWM 7/30 T UL 1051            [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1002011001GE      10/1 MTW/AWM 105/30 B 2/64 105     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1202011001GE      12/1 MTW/AWM 65/30 B 2/64 105C     [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1210111001GE      12/1 MTW/AWM 19/0185 B 2/64        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2090012101GE      20/2 FLAT JACKETED AWM 105C        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1811011019GE      18/1 AWM 16/30 B 1/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
18113P8519GE      18/1 AWM 7/0152 B 1/64 105C        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
1811518010GE      18/1 AWM 16/30 T 1/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2011017001GE      20/1 AWM 10/30 B 1/64 105C         [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2211517001GE      22/1 AWM 7/30 T 1/64 105C          [*]         [*]      35 Gal Drum         [*]           [*]           [*]
2411517009GE      24/1 AWM 7/0076 T 1/64 105C        [*]         [*]      35 Gal Drum         [*]           [*]           [*]
                                                     [*]
</Table>

LEAD TIME:      [*]

COPPER
BASE:           QUOTED @ $1.00 COMEX

FREIGHT
TERMS:          FREIGHT COLLECT DURANGO, MEXICO

PAYMENT                                             ALL QUOTED TERMS ARE
TERMS:          [*]                              SUBJECT TO CHANGE BASED ON
                                              SALES VOLUME AND PAYMENT HISTORY.
INSIDE SALES
REP:            MONICA COFFMAN

ACCOUNT
MANAGER:        DAVID PASCUAL

EXPIRATION
DATE:           30 DAYS FROM DATE OF ISSUE

** PART NUMBERS PROVIDED ON QUOTES ARE FOR IWG INTERNAL PURPOSES ONLY.
   SPECIFIC PART NUMBERS MUST BE DETERMINED AT TIME OF ORDER.

THANK YOU FOR THE OPPORTUNITY TO QUOTE YOUR WIRE REQUIREMENTS.

PREPARED BY IWGID SALES DEPARTMENT: RS



                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>

                                                                      SCHEDULE A

INTERNATIONAL WIRE GROUP                                          DATE: 02/02/04
INSULATED WIRE DIVISION                                     IWGID RFQ #: 0312071
TELEPHONE #: 1-800-736-9473
PRICE QUOTATION                                                         REV 1
PREPARED FOR:                                     PLEASE REFERENCE THIS RFQ #
    VIASYSTEMS                                  WHEN YOU PLACE YOUR FIRST ORDER!
    EL PASO, TX


<Table>
<Caption>
                                                                 STANDARD                    MINIMUM
                                                    COPPER       PACKAGE                     ORDER QTY                  2004 QUOTE
IWG PART             PRODUCT              VOLUME    WEIGHT    (inches unless     STD PKG     PER COLOR                  PRICE PER
 NUMBER            DESCRIPTION            (MFT)     PER MFT   otherwise noted)   QTY (FT)      (FT)       LEAD TIME        MFT
---------    ------------------------    --------   -------   ----------------   --------    ---------    ---------     -----------
<S>          <C>                         <C>        <C>       <C>                <C>         <C>          <C>           <C>
100052-10    1/0511 SOLID BARE 16 AWG      [*]        [*]        16x12 Reel        [*]          [*]          [*]            [*]
102255-25    1/1033 SOLID BARE 10 AWG      [*]        [*]        16x12 Reel        [*]          [*]          [*]            [*]
103851-5     1/0808 SOLID BARE 12 AWG      [*]        [*]        16x12 Reel        [*]          [*]          [*]            [*]
103853-5     14GA 1/0653 SOLID BC          [*]        [*]        14x12 Reel        [*]          [*]          [*]            [*]
                                           [*]
</Table>

LEAD TIME:      [*]

COPPER
BASE:           QUOTED @ $1.00 COMEX

FREIGHT
TERMS:          FOB ORIGIN, PREPAID

PAYMENT                                             ALL QUOTED TERMS ARE
TERMS:          [*]                              SUBJECT TO CHANGE BASED ON
                                              SALES VOLUME AND PAYMENT HISTORY.
INSIDE SALES
REP:            MONICA COFFMAN

ACCOUNT
MANAGER:        DAVID PASCUAL

EXPIRATION
DATE:           30 DAYS FROM DATE OF ISSUE

** PART NUMBERS PROVIDED ON QUOTES ARE FOR IWG INTERNAL PURPOSES ONLY.
   SPECIFIC PART NUMBERS MUST BE DETERMINED AT TIME OF ORDER.

THANK YOU FOR THE OPPORTUNITY TO QUOTE YOUR WIRE REQUIREMENTS.

PREPARED BY IWGID SALES DEPARTMENT: RS


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>
INTERNATIONAL WIRE BUY, 2003

                                                                       EXHIBIT I
                                                                   TO SCHEDULE A

<Table>
<Caption>
                                                                                                Qty Rcvd in
Vendor   Part Number      Gauge       Insulation                  Part Description                 2003
------   -----------    ----------    ----------    ----------------------------------------    -----------
UL 1015, 1220, 1569, 1007, 1056, 1120, 1032
<S>      <C>            <C>           <C>           <C>                                         <C>
  IW         A2RX          10            PVC        WIRE 10/12 1050C UL 1015                       [*]
  IW         BRWX          12            PVC        12/65 BARE 600V 105oC UL 1015                  [*]
  IW         BBYX          12            PVC        WIRE 12/19 BARE PVC 105c                       [*]
  IW         CXYX          14            PVC        WIRE 14/19 PVC 105o 600 VOLT                   [*]
  IW         C1YX          14            PVC        WIRE 14/41, BARE, PVC 105oC                    [*]
  IW         DEWR          16            PVC        WIRE AWG16, 105C 600V UL 1032                  [*]
  IW         DYCX          16            PVC        WIRE 16/26 BARE PVC 105c                       [*]
  IW         D1YX          16            PVC        WIRE 16/26, PVC, 105oC                         [*]
  IW         D9WX          16            PVC        WIRE 16GA 16 STRANS UL 1120                    [*]
  IW         M2NX          16            PVC        PVC WIRE 16/65 105o                            [*]
  IW         E2YX          18            PVC        PVC WIRE 18/41 105o                            [*]
  IW         E3WX          18            PVC        WIRE 18AWG 150Oc UL 1015                       [*]
  IW         FCWX          18            PVC        WIRE 18/16 105oc UL 1569 (TIN)                 [*]
  IW         FRWC          18            PVC        WIRE 18/16, BARE. PVC 105/\C. 112              [*]
  IW         FTYX          18            PVC        WIRE 18/16, BARE, PVC 105/\C, 1120             [*]
  IW         FUGY          18            PVC        WIRE 18/7, BARE, PVC 105/\C, 1569              [*]
  IW         FYYX          18            PVC        WIRE 18/16, BARE, PVC 105/\C, 1056             [*]
  IW         F3WV          18            PVC        WIRE 18/16, BARE, PVC 105/\C, 1015             [*]
  IW         OMWX          18            PVC        WIRE 18 AWG UL #1061 300V                      [*]
  IW         HZWX          20            PVC        WIRE 20/10 80c UL 1061 300V                    [*]
  IW         H7YR          20            PVC        WIRE 20/10, BARE, PVC 105/\C, 1015             [*]
  IW         H2YR          20            PVC        WIRE, 20/10, BARE, PVC 105/\C, UL 1007         [*]
  IW         JUWX          22            PVC        22/7 TIN 300V UL 1061                          [*]
  IW         J3YX          22            PVC        WIRE 22/7 TIN, PVC 105Co UL 1015               [*]
  IW         J8WV          22            PVC        WIRE 22/7 , TIN, PVC 105/\C, 1569              [*]
  IW         KLYW          24            PVC        WIRE 24/7 TINNED PVC 105Oc                     [*]
 Total                                                                                             [*]
</Table>

<Table>
<Caption>
                                                                                                Qty Rcvd in
Vendor   Part Number      Gauge       Insulation                Part Description                    2003
------   -----------    ----------    ----------    ----------------------------------------    -----------
UL 3173, 3321
<S>      <C>            <C>           <C>           <C>                                         <C>
 IW      AJRX              10           XLPE        WIRE 10/19, BARE, XLPE, 125oC                   [*]
 IW      AJWWX             10           XLPE        GA 10 125oC UL 3173 105 STRAN.                  [*]
 IW      AKRX              10           XLPE        WIRE, 10/19, TIN, XLPE, 150oC                   [*]
 IW      BJWX              12           XLPE        VULKENE WIRE Z 12/19 125oC                      [*]
 IW      BJWWX             12           XLPE        GA 12 125o UL 3173 65 STRANDS                   [*]
 IW      BKRX              12           XLPE        WIRE, 12/19, TIN, XLPE, 150oC                   [*]
 IW      CJYX              14           XLPE        VULKENE WIRE Z 14/19 125oC                      [*]
 IW      CJWWX             14           XLPE        GA 14 125o UL 3173 41 STRANDS                   [*]
 IW      CKYX              14           XLPE        WIRE XL 14/19 150oC UL 3321                     [*]
 IW      DJYX              16           XLPE        VULKENE WIRE Z 16/26 125oC                      [*]
 IW      DKYX              16           XLPE        VULKENE WIRE XL 16/26 150oC                     [*]
 IW      FJYX              18           XLPE        VULKENE WIRE Z 18/16 125oC                      [*]
 IW      FKYX              18           XLPE        VULKENE WIRE XL 18/16 150oC                     [*]
 IW      FNWX              18           XLPE        WIRE 18GA 125o 600V UL 3173                     [*]
 IW      HJYX              20           XLPE        VULKENE WIRE YELLOW 20/10 125/\                 [*]
 IW      HKYX              20           XLPE        WIRE 20/10 TIN 150o UL# 3321                    [*]
 IW      JJVX              22           XLPE        22 GA 125oC WIRE 600 VOL, 7HILOS                [*]
 IW      JKBX              22           XLPE        2210 GA 150o WIRE UL 3321                       [*]
Total                                                                                               [*]
</Table>


<Table>
<Caption>
                                                                                                Qty Rcvd in
Vendor   Part Number      Gauge       Insulation                  Part Description                 2003
------   -----------    ----------    ----------    ----------------------------------------    -----------
No UL
<S>      <C>            <C>           <C>           <C>                                         <C>
 IW      ANBC               10        None          WIRE 10 BARE COPE                              [*]
 IW      BNBC               12        None          WIRE SOLID 12/1 BARE COPER                     [*]
 IW      CNBC               14        None          BARE COPER 14 GA 62"                           [*]
 IW      DNBC               16        None          WIRE SOLIDO 16/1 BARE COPPER                   [*]
Total                                                                                              [*]
</Table>


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>

                                                                       EXHIBIT I
Non International Wire Buy, 2003                                   TO SCHEDULE A

<Table>
<Caption>
 Part                                                                            Qty Rcvd in
Number     Gauge       Insulation                  Part Description                 2003
------   ----------    ----------    ----------------------------------------    -----------
UL 1015, 1230, 1569, 1007, 1056, 1120, 1032
<S>      <C>           <C>           <C>                                         <C>
 F1         18            PVC        WIRE 18/16, BARE, PVC, 105/\C, 1015 ANTHF      [*]
 F2         18            PVC        WIRE 18/16, BARE, PVC, 105/\C, 1056 ANTHF      [*]
Total                                                                               [*]
</Table>


<Table>
<Caption>
 Part                                                                            Qty Rcvd in
Number     Gauge       Insulation                  Part Description                 2003
------   ----------    ----------    ----------------------------------------    -----------
UL 3173, 3321
<S>      <C>           <C>           <C>                                         <C>
 AK         10            XLPE       WIRE 10/19, TIN, XLPE, 150oC                    [*]
 AKW        10            XLPE       CAL 10 150o 105 HILOS UL 3321                   [*]
 A5         10            XLPE       WIRE 10/65 150C 600V UL #3321                   [*]
 BK         12            XLPE       WIRE, 12/19, TIN, XLPE, 150oC                   [*]
 BKW        12            XLPE       GA 12 150o UL 3321 65 HILOS                     [*]
 CA         14            XLPE       GA 14 150o UL 3321 41 STRANDS                   [*]
 CJ         14            XLPE       VULKENE WIRE Z 14/19 125oC                      [*]
 CK         14            XLPE       WIRE XL, 14/19 150oC UL 3321                    [*]
 DK         16            XLPE       VULKENE WIRE XL 16/26 150oC                     [*]
 FK         18            XLPE       VULKENE WIRE XL 18/16 150oC                     [*]
 FK         18            XLPE       VULKENE WIRE XL 18/16 150oC                     [*]
 HK         20            XLPE       WIRE 20/10 TIN 150o UL #3321                    [*]
Total                                                                                [*]
</Table>


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>
                                                                      SCHEDULE B

INTERNATIONAL WIRE BUY, 2003

<Table>
<Caption>
                                                                                                Qty Rcvd in
Vendor   Part Number      Gauge       Insulation                  Part Description                 2003          $ Amount
------   -----------    ----------   ------------   ----------------------------------------    -----------    ------------
UL 3024, 3025, 3071, 3172, 3122, 3239, 3254, 3304
<S>      <C>            <C>          <C>            <C>                                         <C>            <C>
  IW       APRX            10        Sil + Fglass   10/19 200oC 3025 SEW-2 SF-2                    [*]              [*]
  IW       BPWX            12        Sil + Fglass   12/19 200oC UL 3024 SEW-2 SF-2                 [*]              [*]
  IW       CPYX            14        Sil + Fglass   GLASS BRAID, TYPE SF-2, 14 GAGE                [*]              [*]
  IW       CRSX            14        Sil + Fglass   WIRE 14 AWG 150o UL 3239 20KV                  [*]              [*]
  IW       C4WX            14        Sil + Fglass   WIRE 14GA 250o 600V UL 3252                    [*]              [*]
  IW       DRYX            16        Sil + Fglass   16-SF 2-YX FIBERGLASS WIRE                     [*]              [*]
  IW       DRWYB           16        Sil + Fglass   WIRE 16/7 200oC UL STYLE 3071                  [*]              [*]
  IW       D4YX            16        Sil + Fglass   WIRE 250o 16/26 UL 3252 600V                   [*]              [*]
  IW       FHRX            18        Sil + Fglass   WIRE 18/19AWG 200o UL 3304                     [*]              [*]
  IW       FOTX            18        Sil + Fglass   WIRE 18/1 TIN 200o SF-1 300V                   [*]              [*]
  IW       FPYX            18        Sil + Fglass   WIRE 18/7 200o UL #3071 SEW-2                  [*]              [*]
  IW       FPWYB           18        Sil + Fglass   WIRE 18/7 TIN 200oC UL 3071                    [*]              [*]
  IW       FSOX            18        Sil + Fglass   WIRE 200oC 300V 18GA/7 UL 3122                 [*]              [*]
  IW       F4YX            18        Sil + Fglass   18/16 BARE 600V 250o                           [*]              [*]
  IW       HPWS            20        Sil + Fglass   GA 20/10 200oC UL3172 TINBRASS                 [*]              [*]
  IW       JNOX            22        Sil + Fglass   22GA, 200 C, VOLTAGE 10KAC                     [*]              [*]
  IW       OHSX            18        Sil + Fglass   WIRE 18/16 150o UL 3239 20KV                   [*]              [*]
 Total                                                                                             [*]              [*]
</Table>

<Table>
<Caption>
                                                                                                Qty Rcvd in
Vendor   Part Number      Gauge       Insulation                  Part Description                 2003          $ Amount
------   -----------    ----------   ------------   ----------------------------------------    -----------    ------------
UL SPT, SJT, 2291
<S>      <C>            <C>           <C>           <C>                                         <C>            <C>
 IW      PCW001             18           PVC        SJT 18/3 AWG 105o BLACK SINGLE                  [*]              [*]
 IW      PCW002             16           PVC        CORD SET SJT 16/3 BK                            [*]              [*]
 IW      PCW038             16           PVC        SJT 16/3 125/10 105 B                           [*]              [*]
 IW      PCW102             16           PVC        POWER CORD                                      [*]              [*]
 IW      PCW103             20           PVC        POWER CORD                                      [*]              [*]
 IW      PCW295             14           PVC        POWER CORD 14/3 SPT 105o GRAY                   [*]              [*]
 IW      8911450P01         16           PVC        POWER CORD BROWN, SPT, 16 STRAND                [*]              [*]
 IW      8911450P07         16           PVC        POWER CORD GRAY, SPT, 16 STRANDS                [*]              [*]
 IW      8911450P08         16           PVC        POWER CORD BLACK, SPT, 16 STRAND                [*]              [*]
 IW      8911450P09         18           PVC        P. CORD BROWN, SPT, 18/3 STRAND                 [*]              [*]
 IW      8911450P10         18           PVC        CORD STP-3 18/3, 105oC VW-1                     [*]              [*]
 IW      8911450P12         18           PVC        SPT-2, BLACK, 18/3 41 STRAND, 105               [*]              [*]
Total                                                                                               [*]              [*]
</Table>


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>

                                                                      SCHEDULE C



International Wire Group, Inc.
Insulated Wire Division
7222 Engle Road, Fort Wayne, IN 46804
Ph:  (260) 459-8600 Fax:(260) 459-8699

                                                                January 22, 2004

SUBJECT: REQUIREMENTS ANALYSIS AND PRODUCT BUILD PROCEDURE

In order to plan for on-time delivery of product requested by Viasystems Group,
Inc. ("Viasystems"), International Wire Group ("IWG") has established a formal
"requirements analysis and product build" procedure. This procedure is
documented as follows (all times indicated are mountain time):

1.       EDI Transmission - Weekly, an electronic transmission of production and
         inventory forecast requirement information, the EDI 830 material
         release ("EDI 830") will be submitted by Viasystems and received at IWG
         by or before 8:00 am each Thursday ("EDI 830 Transmission Date"). In
         the event that IWG does not receive the EDI 830 transmission by 8:00
         am, IWG will place a phone call to the Viasystems EDI coordinator [*]
         to report that the EDI 830 was not received. If the EDI 830 has not
         been received by 10:00 am on Thursday, the IWG Supply Chain Manager or
         designee will notify [*] (the "Viasystems Planners") or [*] (the
         Viasystems Materials Managers). In the event the EDI 830 is not
         received by 12:00 noon on Thursday, IWG and Viasystems acknowledge that
         for the corresponding week, IWG will not be required to meet the
         analysis and product build requirements of this procedure.

2.       Analysis and Product Build - IWG will analyze the weekly columns in the
         EDI 830 and plan the product build in the following manner:

<Table>
<Caption>
  Via                   Std.     Week 1      Week 2      Week 3     Week 4      Week 5      Week 6      Week 7
  Part     IWG Part     Pack     Oct. 20     Oct. 27     Nov. 3     Nov. 10     Nov. 17     Nov. 24     Dec. 1
<S>        <C>          <C>      <C>         <C>         <C>        <C>         <C>         <C>         <C>

</Table>

         A.       EDI 830 - WEEK 1

         1.       IWG will consider amounts in Week 1 as required immediately.

         2.       Demand listed in Week 1 will be considered "authorized for
                  production build" by Viasystems.

         3.       Demand listed in Week 1 will not be adjusted to account for
                  any IWG shipments occurring prior to the EDT 830 Transmission
                  Date.

         4.       Demand listed in Week 1, except new requirements not stated in
                  the prior release ("drop-ins"), will be available for pull on
                  the EDT 830 Transmission Date.


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


                                       1
<PAGE>

         5.       Drop-in demand listed in Week 1 will be reviewed by IWG and a
                  new production schedule will be developed -- Demand Status
                  Report. Shipment availability on these requirements will be
                  evaluated based upon the number of parts added and the total
                  footage volume dropped in. IWG's Supply Chain Manager (or
                  designee) will discuss this situation with the Viasystems
                  Planners to determine run priority and set-up charges, and
                  delivery will be quoted accordingly. Any requested changes to
                  the new production schedule must be requested in writing
                  (e-mail) and acknowledged in writing (e-mail). IWG will make
                  every effort to accommodate Viasystems demand requirements as
                  quickly as possible.

         B.       EDI 830 - WEEK 2

         1.       IWG will plan production to supply all quantities listed in
                  the Week 2 column of the EDI 830.

         2.       Demand listed in Week 2 will be considered "authorized for
                  production build" by Viasystems.

         3.       Demand listed in Week 2 will not be adjusted to account for
                  any IWG shipments occurring prior to the EDI 830 Transmission
                  Date.

         4.       Demand listed in Week 2, except new requirements not stated in
                  the prior release ("drop-ins"), will be available for pull on
                  the EDI 830 Transmission Date.

         5.       Drop-in demand listed in Week 2 will be reviewed by IWG and a
                  new production schedule will be developed--Demand Status
                  Report. Shipment availability on these requirements will be
                  evaluated based upon the number of parts added and the total
                  footage volume dropped in. IWG's Supply Chain Manager (or
                  designee) will discuss this situation with the Viasystems
                  Planners to determine run priority and set-up charges, and
                  delivery will be quoted accordingly. Any requested changes to
                  the new production schedule must be requested in writing
                  (email) and acknowledged in writing (e-mail). IWG will make
                  every effort to accommodate Viasystems demand requirements as
                  quickly as possible.

         C.       EDI 830 - WEEK 3

         1.       IWG will plan production to supply all quantities listed in
                  the Week 3 column of the EDI 830.

         2.       Demand listed in Week 3 will be considered "authorized for
                  production build" by Viasystems.

         3.       Demand listed in Week 3 will not be adjusted to account for
                  any IWG shipments occurring prior to the EDI 830 Transmission
                  Date.

         4.       Demand listed in Week 3, except new requirements not stated in
                  the prior release ("drop-ins"), will be available for pull on
                  the second business day after the EDI 830 Transmission Date.

         5.       Drop-in demand listed in Week 3 will be reviewed by IWG and a
                  new production schedule will be developed -- Demand Status
                  Report. Shipment availability on these requirements will be
                  evaluated based upon the number of parts added and the total
                  footage volume dropped in. IWG's Supply Chain Manager (or
                  designee) will discuss this situation with the Viasystems
                  Planners to determine run priority and set-up charges, and
                  delivery will be quoted accordingly.



<PAGE>


                  Any requested changes to the new production schedule must be
                  requested in writing (e-mail) and acknowledged in writing
                  (e-mail). IWG will make every effort to accommodate Viasystems
                  demand requirements as quickly as possible.

         D.       EDI 830-WEEK 4

         1.       IWG will plan production to supply all quantities listed in
                  the Week 4 column of the EDI 830.

         2.       Demand listed in Week 4 will be considered "authorized for
                  production build" by Viasystems.

         3.       Demand listed in Week 4 will not be adjusted to account for
                  any IWG shipments occurring prior to the EDI 830 Transmission
                  Date.

         4.       Demand listed in Week 4, except new requirements not stated in
                  the prior release ("drop-ins"), will be available for pull on
                  the sixth business day after the EDI 830 Transmission Date.

         5.       Drop-in demand listed in Week 4 will be reviewed by IWG and a
                  new production schedule will be developed -- Demand Status
                  Report. Shipment availability on these requirements will be
                  evaluated based upon the number of parts added and the total
                  footage volume dropped in. IWG's Supply Chain Manager (or
                  designee) will discuss this situation with the Viasystems
                  Planners to determine run priority and set-up charges, and
                  delivery will be quoted accordingly. Any requested changes to
                  the new production schedule must be requested in writing
                  (e-mail) and acknowledged in writing (e-mail). IWG will make
                  every effort to accommodate Viasystems demand requirements as
                  quickly as possible.

         E.       EDI 830 - WEEK 5

         1.       IWG will plan production to supply all quantities listed in
                  the Week 5 column of the EDI 830.

         2.       Demand listed in Week 5 will be considered "authorized for
                  production build" by Viasystems.

         3.       Demand listed in Week 5 will not be adjusted to account for
                  any IWG shipments occurring prior to the EDI 830 Transmission
                  Date.

         4.       Demand listed in Week 5 will be available for pull on the
                  eleventh business day after the EDI 830 Transmission Date.

         F.       EDI 830-WEEKS 6 AND 7

         1.       IWG will review production to supply all quantities listed in
                  the Weeks 6 and 7 column of the EDI 830. Demand listed in
                  Weeks 6 and 7 will be used to plan copper balances to meet
                  forecasted levels.

         2.       Demand listed in Weeks 6 and 7 will not be considered
                  "authorized for production build" by Viasystems. In the event
                  IWG determines that weekly copper requirements are increasing
                  over recent historical usage, IWG will contact the Viasystems
                  Material Planners for confirmation that



<PAGE>


                  the demand is accurate. If the Viasystems Material Planners
                  confirm the forecast demand in writing (email), IWG will
                  increase the in-house stocking levels or purchase orders in
                  accordance with the written confirmation. If IWG is quoted a
                  delivery lead-time from their supplier that is longer than the
                  forecasted requirement date, the IWG Supply Chain Manager will
                  notify the Viasystems Planners of any potential delivery
                  issues.

         G.       EDI 830 - WEEKS 8 AND BEYOND

         1.       IWG will not build any product that is listed in the Weeks 8
                  and beyond column of the EDI 830. Demand listed in weeks 8 and
                  beyond will not be considered "authorized for production build
                  by Viasystems."

SEE EXHIBIT I FOR CERTAIN EXAMPLES OF THE ANALYSIS AND BUILD PROCEDURE BASED OFF
OF THE EDI 830

         3.       Request For Shipment of Material -- In order to ensure
                  delivery of material, the "Pick Request" Form must be
                  completed and received by email by 11:00 am the day prior to
                  requested shipment. Upon receipt of Pick Request Form, IWG
                  will respond within three hours regarding status of material
                  arid confirmation of toad to be shipped the next day. Request
                  for material to be shipped same day will be addressed on a
                  request basis.

         4.       IWG Build Confirmation -- By close of business every Friday,
                  IWG will provide each Viasystems facility with a Demand Status
                  Report that documents the requirements for each part number
                  versus our ability to supply. It will highlight issues that
                  Viasystems needs to be aware of:

         5.       Set-up Charges -- Set-up charges result when drop-in
                  Viasystems demand requires IWG to break into their production
                  schedule. A set-up charge of [*]

                  will be applied to a drop in order that requires IWG to break
                  into its existing production schedule to expedite the
                  Viasystems order. Delivery of drop in orders will be handled
                  as previously stated in paragraphs above.

         6.       Shipments Made in Multiples of Full Standard Packages -- For
                  product demand that equates to less than multiples of a full
                  standard package, IWG will round up to the next full container
                  quantity and build the part if there is future demand through
                  Week 6. If there is not enough demand through Week 6, IWG will
                  contact the Viasystems Planner. If the Viasystems Planner
                  gives written authorization, IWG will build the additional
                  container.

         7.       New Color Combinations -- When new parts appear on the EDI 830
                  for the first time and represent a new color combination in a
                  product family that IWG already supplies, IWG will set up
                  these parts in their Engineering data base upon receipt of
                  PPAP waiver from Viasystems. These parts will then be set up
                  for all IWG facilities capable of manufacturing the noted
                  products within two business days after receiving the PPAP
                  waiver. Product will be built and delivered according to the
                  procedure as previously stated in paragraphs above. IWG will
                  provide First Piece documentation from the first location
                  producing the desired product listing and thereby qualifying
                  all applicable IWG manufacturing locations within 24 hours
                  after shipment of product to Viasystems. No other approval
                  documentation or activity shall be required.

         8.       New Part Construction -- When new parts which have been
                  previously quoted appear on the EDT 830 for the first time and
                  represent a new part construction to IWG, Viasystems must
                  provide a detailed specification sheet to IWG. After receiving
                  the specification sheet from Viasystems, the IWG Engineering
                  group will review the specification to determine product
                  performance capability and manufacturing feasibility. If this
                  is a product IWG can produce, IWG will engineer the part in
                  the database and quote a lead-time to


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>


                  Viasystems that takes into consideration availability of
                  required raw material, tooling, etc. IWG will provide
                  Viasystems First Piece documentation within 24 hours after
                  shipment. This will be followed by PAP or PPAP within 90 days.
                  The PAP or PPAP documentation will list and thereby qualify
                  the initial IWG producing facility and all other facilities
                  capable of manufacturing this product type. With this signed
                  off PAP or PPAP documentation, only first piece documentation
                  will be required as additional IWG manufacturing locations are
                  used to produce this product. If the product requires further
                  development, IWG will notify Viasystems to determine whether
                  or not developmental samples, testing and the resulting PAP /
                  PPAP approval activity should be undertaken by IWG.

         9.       Samples -- When IWG receives a written request for a product
                  sample, Viasystems must provide a detailed specification sheet
                  to IWG. After receiving the approved quotation and
                  specification sheet from Viasystems, the IWG Engineering group
                  will review the specification to determine product performance
                  capability and manufacturing feasibility. IWG will engineer
                  the part in the database and quote a lead-time to Viasystems
                  that takes into consideration availability of required raw
                  material, tooling etc. The minimum run for a sample is 25,000
                  feet or the next nearest standard package. IWG will provide
                  Viasystems First Piece documentation within 24 hours after
                  shipment. This will be followed by a PAP or PPAP within 90
                  days. The PAP or PPAP documentation will list and thereby
                  qualify the initial IWG producing facility and all other
                  facilities capable of manufacturing this product type. With
                  this signed off PAP or PPAP documentation, only first piece
                  documentation will be required as additional IWG manufacturing
                  locations are used to produce this product. If the product
                  requires further development, IWG will notify Viasystems to
                  determine whether or not development samples, testing and the
                  resulting PAP/PPAP approval activity should be undertaken by
                  IWG.

        10.       Slow Moving Inventory -- Product produced to the authorized
                  forecast and not pulled will be evaluated on a monthly basis.
                  IWG will summarize a list of parts where inventory exceeds 90
                  days (the "Inventory Report"). The IWG Supply Chain Manager
                  (or designee) will submit the Inventory Report each month to
                  the Viasystems Planners, [*]. Viasystems will review the list
                  and determine the appropriate disposition for each part within
                  20 days of receiving the monthly Inventory Report:

                  -        Scrap at IWG and invoice Viasystems

                  -        Ship to Viasystems and invoice the facility

         11.      In the event a mutually acceptable resolution cannot be
                  reached, the dispute will be raised to the Senior Executive
                  level.


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>

                                    EXHIBIT I

                           EDI 830 GUIDELINE EXAMPLES

IWG will interpret the EDI 830 in the following manner (Example: Release
10-20-03 sent to two on 10-30-03):

[*]

A =    Past due quantity without any future demand

B =    Consistent demand in all weeks

C =    A weekly forecast quantity that is less than 50% of a standard
       package

D =    Forecast quantity that is not stated in multiples of full
       standard packages

E =    Inconsistent demand in all weeks

PAST DUE QUANTITY WITHOUT ANY FUTURE REMAND -- EXAMPLE A
IWG will plan production to supply demand found in the week 1 bucket - week of
October 20 in the above example. [*]

CONSISTENT DEMAND IN ALL WEEKS -- EXAMPLE B
IWG will plan production to supply demand found in weeks 2, 3, 4 and 5 - October
27th, November 3rd, November 10th and November 17th in example B. Demand in
these buckets will be considered "authorized" for production. Demand found in
week 2 will not be adjusted to account for any IWG shipments, rather, we will
assume that all shipments made prior to the transmission date have been received
at Viasystems. [*]

A WEEKLY FORECAST QUANTITY LESS THAN 50% OF A STANDARD PACKAGE-- EXAMPLE C
For product demand that equates to less than half of a fill package and there is
no future forecast quantity in any week, IWG will contact the Material Planner
at Viasystems for direction on how to handle this demand. If the Planner needs
the product and authorizes the build in writing via email, IWG will build and
ship a full container to satisfy this demand.


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.


<PAGE>


FORECAST QUANTITY NOT STATED IN MULTIPLES OF FULL STANDARD PACKAGES - EXAMPLE D
For product demand that equates to less than multiples of a full standard
package, IWG will round up to the next full container quantity and build the
part if there is future demand in week 6. If there is no demand in this week,
IWG will contact the Viasystems Planner. If the Planner gives written
authorization by email, IWG will build the additional container. [*]

INCONSISTENT DEMAND IN ALL WEEKS -- EXAMPLE E
When demand is not consistent in all weeks, IWG will build product to satisfy
the demand as stated in the 830 Release. For part number DJCW above, we [*].
Inventory will not be built for requirements that are not stated in the most
recent EDI forecast.

Product will be available for Viasystems to pull on the following dates:

WEEK ONE - (OCTOBER 20TH IN OUR EXAMPLE)
All week one requirements, except new requirements not stated in the prior
release, will be available for pull on the EDI transmission date (October 30th).

WEEK TWO - (OCTOBER 27TH IN OUR EXAMPLE)
All week two requirements, except new requirements not stated in the prior
release, will be available for pull on the EDI transmission date (October 30th).

WEEK THREE -- (NOVEMBER 3RD)
Requirements for all parts in the third weekly bucket will be available for
shipment no later than the second business day following the EDI transmission --
November 3rd in the above example.

WEEK FOUR -- (NOVEMBER 10TH)
Requirements for demand in this week will be available for shipment on the 6th
business day following the EDI transmission date. In our example this would be
November 7th.

WEEK FIVE -- (NOVEMBER 17TH)
Requirements for demand in this week will be new requirements that International
Wire will immediately put into the build schedule. These requirements will be
available for shipment on the eleventh business thy after the EDI is sent
(November 14th in our example above).


                                             * Omitted pursuant to a request for
                                             confidential treatment and filed
                                             separately with the Securities and
                                             Exchange Commission.