Document:

Exhibit 10.5

 

FORM OF UNDERWRITER UNIT SUBSCRIPTION AGREEMENT

 

This
UNIT SUBSCRIPTION AGREEMENT (this “Agreement”) is made as of the 18th day of October, 2021, by and
between Enterprise 4.0 Technology Acquisition Corp., a Cayman Islands exempted company (the
“Company”),  having
its principal place of business at 533 Airport Blvd Suite 400 Burlingame, CA 94010, and
[    ](“Subscriber”), having its principal place of business at [      ].

 

WHEREAS, the Company desires to sell on a private
placement basis (the “Offering”) an aggregate of [      ]
units (“Units”) of the Company, each Unit comprised of one Class A ordinary share of the Company, par
value $0.0001 per share (“Ordinary Shares”), and one-half of one warrant to purchase one Ordinary Share (“Warrant”),
for an aggregate purchase price of $[ ], or $10.00 per Unit. The Ordinary Shares underlying the Warrants are hereinafter
referred to as the “Warrant Shares.” The Ordinary Shares underlying the Units (excluding the Warrant Shares) are
hereinafter referred to as the “Placement Shares.” The Warrants underlying the Units are hereinafter referred to as the
“Placement Warrants.” The Units, Placement Shares, Placement Warrants and Warrant Shares, collectively, are
hereinafter referred to as the “Securities.” Placement Warrants may be exercised only to the extent that, when
aggregated with other Placement Warrants being exercised, the exercise is for a whole share or whole shares; no fractional shares
shall be issuable. The exercise price for any Warrant Share shall be $11.50. Subject to the foregoing, the Placement Warrants are
exercisable during the period commencing 30 days following the completion of the Company’s initial business combination (the
“Business Combination”), as such term is defined in the registration statement filed in connection with the IPO,
as amended at the time it becomes effective (the “Registration Statement”), and expiring on the fifth anniversary
of the commencement of sales in the IPO (provided that so long as the Placement Warrants are held by the Subscriber or its
designees, the Subscriber or its designees will not be permitted to exercise such Placement Warrants after the five year anniversary
of the effective date of the Registration Statement); and

 

WHEREAS,
Subscriber wishes to purchase [    ] Units from the Company and the Company wishes to accept such subscription
from Subscriber.

 

NOW, THEREFORE, in consideration
of the premises and the mutual covenants hereinafter set forth and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the Company and Subscriber hereby agree as follows:

 

1. Agreement to
Subscribe

 

1.1
Purchase and Issuance of the Units. Upon the terms and subject to the conditions of this Agreement, Subscriber hereby agrees to purchase
from the Company, and the Company hereby agrees to sell to Subscriber, on the Closing Date (as defined below), [    ] Units for an aggregate
purchase price of $ [     ] (the “Purchase Price”).

 

1.2 Delivery of the Purchase Price.
Upon execution of this Agreement, the Company is hereby bound to fulfill its obligations hereunder and Subscriber hereby commits to deliver
into a trust account (the “Trust Account”) held at JP Morgan Chase Bank, N.A. or any other financial institution chosen
by the Company, with Continental Stock Transfer & Trust Company acting as trustee (“Continental”), the Purchase
Price in immediately available funds by wire transfer or such other form of payment as shall be acceptable to the Trustee, in its sole
and absolute discretion, at Closing (as defined below).

 

1.3 Closing. The
closing of the Offering (the “Closing”), shall take place at the offices of Ellenoff Grossman & Schole LLP
simultaneously with, and is contingent upon, the closing of the IPO on or before June 30,

2022 (the “Closing Date”).

 

1.4 Termination. This Agreement
and each of the obligations of the undersigned shall be null and void and without effect if the Closing does not occur prior to June 30,
2022.

 

     

     

    

 

 2. Representations and Warranties of Subscriber

 

Subscriber represents and warrants to the Company that:

 

2.1 No Government Recommendation
or Approval. Subscriber understands that no federal or state agency has passed upon or made any recommendation or endorsement of the
Company or the Offering of the Securities.

 

2.2 Accredited Investor. Subscriber
represents that it is an “accredited investor” as such term is defined in Rule 501(a) of Regulation D under the Securities
Act of 1933, as amended (the “Securities Act”), and acknowledges that the sale contemplated hereby is being made in
reliance, among other things, on a private placement exemption to “accredited investors” under the Securities Act and similar
exemptions under state law.

 

2.3 Intent. Subscriber is purchasing
the Securities solely for investment purposes, for such Subscriber’s own account (and/or for the account or benefit of its members
or affiliates, as permitted, pursuant to the terms hereof), and not with a view to the distribution thereof and Subscriber has no present
arrangement to sell the Securities to or through any person or entity except as may be permitted hereunder. Subscriber shall not engage
in hedging transactions with regard to the Securities unless in compliance with the Securities Act.

 

2.4 Restrictions on Transfer.
Subscriber acknowledges and understands the Units are being offered in a transaction not involving a public offering in the United States
within the meaning of the Securities Act. The Securities have not been registered under the Securities Act and, if in the future Subscriber
decides to offer, resell, pledge or otherwise transfer the Securities, such Securities may be offered, resold, pledged or otherwise transferred
only (A) pursuant to an effective registration statement filed under the Securities Act, (B) pursuant to an exemption from registration
under Rule 144 promulgated under the Securities Act, if available, or (C) pursuant to any other available exemption from the registration
requirements of the Securities Act, and in each case in accordance with any applicable securities laws of any state or any other jurisdiction.
Notwithstanding the foregoing, Subscriber acknowledges and understands the Securities are subject to transfer restrictions as described
in Section 8 hereof. Subscriber agrees that, if any transfer of its Securities or any interest therein is proposed to be made, as a condition
precedent to any such transfer Subscriber may be required to deliver to the Company an opinion of counsel satisfactory to the Company
with respect to such transfer. Absent registration or another available exemption from registration, Subscriber agrees it will not transfer
the Securities (unless otherwise permitted pursuant to the terms hereof, as described in the Registration Statement). Subscriber further
acknowledges that because the Company is a shell company, Rule 144 may not be available to Subscriber for the resale of the Securities
until the one year anniversary following completion of the Business Combination, despite technical compliance with the requirements of
Rule 144 and the release or waiver of any contractual transfer restrictions.

 

2.5 Sophisticated Investor.

 

(i) Subscriber is sophisticated in
financial matters and is able to evaluate the risks and benefits of the investment in the Securities.

 

(ii) Subscriber is aware that an investment
in the Securities is highly speculative and subject to substantial risks because, among other things, (a) the Securities are subject to
transfer restrictions and have not been registered under the Securities Act and therefore cannot be sold unless subsequently registered
under the Securities Act or an exemption from such registration is available and (b) Subscriber has waived its redemption rights with
respect to the Securities as set forth in Section 5 hereof, and the Securities held by Subscriber are not entitled to, and have no right,
interest or claim to any monies held in the Trust Account, and accordingly Subscriber may suffer a loss of a portion or all of its investment
in the Securities. Subscriber is able to bear the economic risk of its investment in the Securities for an indefinite period of time.

 

    2

     

    

 

2.6 Independent Investigation.
Subscriber, in making the decision to purchase the Units, has relied upon an independent investigation of the Company and has not relied
upon any information or representations made by any third parties or upon any oral or written representations or assurances from the Company,
its officers, directors or employees or any other representatives or agents of the Company, other than as set forth in this Agreement.
Subscriber is familiar with the business, operations and financial condition of the Company and has had an opportunity to ask questions
of, and receive answers from the Company’s officers and directors concerning the Company and the terms and conditions of the Offering
and has had full access to such other information concerning the Company as Subscriber has requested. Subscriber confirms that all documents
that it has requested have been made available and that Subscriber has been supplied with all of the additional information concerning
this investment which Subscriber has requested.

 

2.7 Organization and
Authority. Subscriber is duly organized, validly existing and in good standing under the laws of the State of New York and it
possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement.

 

2.8 Authority. This Agreement
has been validly authorized, executed and delivered by Subscriber and is a valid and binding agreement enforceable in accordance with
its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, fraudulent conveyance, moratorium, reorganization,
or similar laws relating to, or affecting generally the enforcement of, creditors’ rights and remedies or by equitable principles
of general application and except as enforcement of rights to indemnity and contribution may be limited by federal and state securities
laws or principles of public policy.

 

2.9 No Conflicts. The execution, delivery and
performance of this Agreement and the completion by Subscriber of the transactions contemplated hereby do not violate, conflict with
or constitute a default under (i) Subscriber's charter documents, (ii) any agreement or instrument to which Subscriber is a party or
(iii) any law, statute, rule or regulation to which Subscriber is subject, or any agreement, order, judgment or decree to which
Subscriber is subject, except as would not be material to Subscriber’s performance of its obligations hereunder.

 

2.10 No Legal Advice from
Company. Subscriber acknowledges it has had the opportunity to review this Agreement and the transactions contemplated by this
Agreement and the other agreements entered into between the parties hereto with Subscriber’s own legal counsel and investment
and tax advisors. Except for any statements or representations of the Company made in this Agreement and the other agreements
entered into between the parties hereto, Subscriber is relying solely on such review, counsel and advisors and not on any statements
or representations of the Company or any of its representatives or agents for legal, tax or investment advice with respect to this
investment, the transactions contemplated by this Agreement or the securities laws of any jurisdiction.

 

2.11 Reliance on Representations
and Warranties. Subscriber understands the Units are being offered and sold to Subscriber in reliance on exemptions from the registration
requirements under the Securities Act, and analogous provisions in the laws and regulations of various states, and that the Company is
relying upon the truth and accuracy of the representations, warranties, agreements, acknowledgments and understandings of Subscriber set
forth in this Agreement in order to determine the applicability of such provisions.

 

2.12 No General Solicitation. Subscriber is not
subscribing for the Units as a result of or subsequent to any general solicitation or general advertising, including but not limited
to any advertisement, article, notice or other communication published in any newspaper, magazine, or similar media or broadcast
over television or radio, or presented at any seminar or meeting or in a registration statement with respect to the IPO filed with
the Securities and Exchange Commission (“SEC”).

 

2.13 Legend. Subscriber acknowledges and agrees
the certificates evidencing each of the Securities shall bear a restrictive legend (the “Legend”), in form and
substance substantially as set forth in Section 4 hereof.

 

3.
Representations, Warranties and Covenants of the Company

 

The Company represents and warrants to, and agrees with, Subscriber
that:

 

3.1 Valid Issuance of Capital Shares.
The total number of shares of all classes of ordinary and preferred shares which the Company has authority to issue is 500,000,000 Class
A ordinary shares, 50,000,000 Class B ordinary shares and 5,000,000 preference shares (“Preferred Shares”). As of the
date hereof, the Company has issued and outstanding 7,187,500 Class B ordinary shares (of which up to 937,500 shares are subject to forfeiture)
and no Preferred Shares. All of the issued ordinary shares of the Company have been duly authorized, validly issued, and are fully paid
and non-assessable.

 

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3.2 Title to Securities. Upon
issuance in accordance with, and payment pursuant to, the terms hereof and that certain Warrant Agreement to be entered into between the
Company and Continental, as warrant agent (the “Warrant Agreement”), as the case may be, each of the Units, Placement
Shares, Placement Warrants and the Warrant Shares will be duly and validly issued, fully paid and non-assessable. On the date of issuance
of the Units, the Warrant Shares shall have been reserved for issuance. Upon issuance in accordance with, and payment pursuant to, the
terms hereof and the Warrant Agreement, as the case may be, Subscriber will have or receive good title to the Units, Placement Shares
and Placement Warrants, free and clear of all liens, claims and encumbrances of any kind resulting from actions of, or any failure to
act by, the Company, other than (i) transfer restrictions hereunder and (ii) transfer restrictions under federal and state securities
laws.

 

3.3 Organization and Qualification.
The Company is an exempted company duly incorporated, validly existing and in good standing under the laws of the Cayman Islands and has
the requisite corporate power to own its properties and assets and to carry on its business as now being conducted.

 

3.4 Authorization; Enforcement.
(i) The Company has the requisite corporate power and authority to enter into and perform its obligations under this Agreement and to
issue the Securities in accordance with the terms hereof, (ii) the execution, delivery and performance of this Agreement by the Company
and the completion by it of the transactions contemplated hereby have been duly authorized by all necessary corporate action, and no further
consent or authorization of the Company or its Board of Directors or shareholders is required, and (iii) this Agreement constitutes a
valid and binding obligation of the Company enforceable against the Company in accordance with its terms, except as such enforceability
may be limited by applicable bankruptcy, insolvency, fraudulent conveyance, moratorium, reorganization, or similar laws relating to, or
affecting generally the enforcement of, creditors’ rights and remedies or by equitable principles of general application and except
as enforcement of rights to indemnity and contribution may be limited by federal and state securities laws or principles of public policy.

 

3.5 No Conflicts.
The execution, delivery and performance of this Agreement and the completion by the Company of the transactions contemplated hereby
do not (i) result in a violation of the Company’s amended and restated memorandum and articles of association, (ii) conflict
with, or constitute a default under any agreement or instrument to which the Company is a party or by which it is bound or (iii)
violate any law statute, rule or regulation to which the Company is subject or any agreement, order, judgment or decree to which the
Company is subject. Other than any SEC or state securities filings which may be required to be made by the Company subsequent to the
Closing, and any registration statement which may be filed pursuant thereto, the Company is not required under federal, state or
local law, rule or regulation to obtain any consent, authorization or order of, or make any filing or registration with, any court
or governmental agency or self-regulatory entity in order for it to perform any of its obligations under this Agreement or issue the
Units, Placement Shares, Placement Warrants or the Warrant Shares in accordance with the terms hereof.

 

4.
Legends

 

4.1 Legend. The Company will
issue the Units, Placement Shares and Placement Warrants, and, when issued, the Warrant Shares, purchased by Subscriber in the name of
Subscriber. The Securities will bear the following Legend and appropriate “stop transfer” instructions:

 

“THE SECURITIES REPRESENTED
HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR ANY STATE SECURITIES
LAWS AND NEITHER THESE SECURITIES NOR ANY INTEREST THEREIN MAY BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED OF EXCEPT
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR SUCH LAWS OR AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT AND SUCH LAWS WHICH, IN THE OPINION OF COUNSEL FOR THIS CORPORATION, IS AVAILABLE.”

 

“THE SECURITIES REPRESENTED
BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON TRANSFER PURSUANT TO A UNIT SUBSCRIPTION AGREEMENT BETWEEN ENTERPRISE 4.0 TECHNOLOGY
ACQUISITION CORP. AND [    ] AND MAY ONLY BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED OF DURING THE TERM THEREOF
PURSUANT TO THE TERMS SET FORTH IN THE UNIT SUBSCRIPTION AGREEMENT.”

 

    4

     

    

 

4.2 Subscriber’s Compliance. Nothing in
this Section 4 shall affect in any way Subscriber’s obligations and agreements to comply with all applicable securities laws
upon resale of the Securities.

 

4.3 Company’s Refusal to
Register Transfer of the Securities. The Company shall refuse to register any transfer of the Securities if, in the sole judgment
of the Company, such purported transfer would not be made (i) pursuant to an effective registration statement filed under the Securities
Act, or (ii) pursuant to an available exemption from the registration requirements of the Securities Act and applicable state securities
laws and (iii) in compliance herewith.

 

4.4 Registration Rights. Subscriber
will be entitled to certain registration rights which will be governed by a registration rights agreement (“Registration Rights
Agreement”) to be entered into between, among others, Subscriber and the Company, on or prior to the effective date of the Registration
Statement.

 

5.
Waiver of Liquidation Distributions.

 

In connection with the Securities purchased
pursuant to this Agreement, Subscriber hereby waives any and all redemption rights (i) in connection with the Company’s completion
of the Business Combination, (ii) upon the Company’s failure to complete the Business Combination within 18 months from the completion
of the IPO or the liquidation of the Company prior to the expiration of such 18 month period or (iii) if the Company seeks an amendment
to its amended and restated memorandum and articles of association that would affect the substance or timing of the Company’s obligation
to redeem 100% of the Public Shares (as defined below). In the event Subscriber purchases Ordinary Shares in the IPO or in the aftermarket
(“Public Shares”), Subscriber shall be eligible to redeem any Public Shares upon the same terms offered to all other
holders of Ordinary Shares purchased in the IPO.

 

6.
Termination of Placement Warrants.

 

6.1 Failure to Completion Business
Combination. The Placement Warrants shall be terminated upon the dissolution of the Company or in the event that the Company does
not complete the Business Combination within 18 months from the completion of the IPO.

 

6.2 Termination of
Rights as Holder. If the Placement Warrants are terminated in accordance with Section 6.1, then after such time, Subscriber (or
its successor in interest) shall no longer have any rights as a holder of such Placement Warrants and the Company shall take such
action as is appropriate to cancel such Placement Warrants. Subscriber hereby irrevocably grants the Company a limited power of
attorney for the purpose of effectuating the foregoing and agrees to take any and all measures reasonably requested by the Company
necessary to effect the foregoing.

 

7.
Rescission Right Waiver and Indemnification.

 

7.1 Subscriber
understands and acknowledges an exemption from the registration requirements of the Securities Act requires there be no general
solicitation of purchasers of the Units. In this regard, if the IPO were deemed to be a general solicitation with respect to the
Units, the offer and sale of such Units may not be exempt from registration and, if not, Subscriber may have a right to rescind its
purchase of the Units. In order to facilitate the completion of the Offering and in order to protect the Company, its shareholders
and the amounts in the Trust Account from claims that may adversely affect the Company or the interests of its shareholders,
Subscriber hereby agrees to waive, to the maximum extent permitted by applicable law, any claims, right to sue or rights in law or
arbitration, as the case may be, to seek rescission of its purchase of the Units to the extent that such recession right results
from actions of Subscriber that result in the IPO being deemed a general solicitation with respect to the Units. Subscriber
acknowledges and agrees this waiver is being made in order to induce the Company to sell the Units to Subscriber. Subscriber agrees
the foregoing waiver of rescission rights shall apply to any and all known or unknown actions, causes of action, suits, claims or
proceedings (collectively, “Claims”) and related losses, costs, penalties, fees, liabilities and damages, whether
compensatory, consequential or exemplary, and expenses in connection therewith, including reasonable attorneys’ and expert
witness fees and disbursements and all other expenses reasonably incurred in investigating, preparing or defending against any
Claims, whether pending or threatened, in connection with any present or future actual or asserted right to rescind the purchase of
the Units hereunder or relating to the purchase of the Units and the transactions contemplated hereby.

 

    5

     

    

 

7.2 Subscriber agrees not to
seek recourse against the Trust Account for any reason whatsoever in connection with its purchase of the Units or any Claim that may arise
now or in the future, provided that nothing herein shall preclude Subscriber from making any Claim or seeking recourse against the funds
held outside of the Trust Account or seeking payment of any deferred underwriting fee due and payable pursuant to the underwriting agreement
for the IPO.

 

7.3 Subscriber acknowledges
and agrees that the shareholders of the Company are and shall be third-party beneficiaries of this Section 7.

 

7.4 Subscriber agrees that, to the extent any
waiver of rights under this Section 7 is ineffective as a matter of law, Subscriber has offered such waiver for the benefit of the
Company as an equitable right that shall survive any statutory disqualification or bar that applies to a legal right. Subscriber
acknowledges the receipt and sufficiency of consideration received from the Company hereunder in this regard.

 

8.
Lock-Up Period

 

8.1. Subscriber agrees
that it shall not Transfer any Securities until 30 days following the completion of the Business Combination (or earlier in the
event of the Company’s liquidation, merger, share exchange, reorganization or other similar transaction which results in all
of the Company’s shareholders having the right to exchange their Ordinary Shares for cash, securities or other property);
provided, however, that Transfers of Securities are permitted (a) to the Company’s officers, directors or advisors, any
affiliates or family members of any of the Company’s officers, directors or advisors, any member(s) of the Sponsor or any
affiliates of the Sponsor; (b) in the case of an individual, by gift to a member of such individual’s immediate family or to a
trust, the beneficiary of which is a member of such individual’s immediate family, an affiliate of such individual or to a
charitable organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of such
individual; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers
made in connection with any forward purchase agreement or similar arrangement or in connection with the completion of the Business
Combination at prices no greater than the price at which the shares or warrants were originally purchased; (f) in the event of the
Company’s liquidation prior to the completion of the Business Combination; or (g) by virtue of the laws of the state of
incorporation or formation of Subscriber or Subscriber’s limited liability company agreement upon dissolution of Subscriber;
provided, however, that in the case of clauses (a) through (e) or (g), these permitted transferees must enter into a written
agreement with the Company agreeing to be bound by the Transfer restrictions herein.

 

8.2. For purposes of Section 8.1, the
term “Transfer” shall mean the (a) sale of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any
option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent
position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Securities Exchange
Act of 1934, as amended, and the rules and regulations of the SEC promulgated thereunder with respect to, any of the Securities, (b) entry
into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any
of the Securities, whether any such transaction is to be settled by delivery of such Securities, in cash or otherwise, or (c) public announcement
of any intention to effect any transaction specified in clause (a) or (b).

 

8.3 In addition to the restrictions
on transfer described in Section 8.1, Subscriber acknowledges and agrees that the Units and their component parts and the related registration
rights will be deemed compensation by the Financial Industry Regulatory Authority (“FINRA”) and will therefore, pursuant
to FINRA Rule 5110(e)(1), be subject to lock-up for 180 days from the commencement of sales in the IPO. Additionally, the Units and their
component parts and the related registration rights may not be sold, transferred, assigned, pledged or hypothecated or be the subject
of any hedging, short sale, derivative, put or call transaction that would result in the economic disposition of the Securities by any
person for a period of 180 days immediately following the commencement of sales in the IPO, except to any FINRA member participating
in the IPO and the bona fide officers or partners, associated persons or affiliates of such participating FINRA member.

 

    6

     

    

 

9.
Terms of the Units and Placement Warrants

 

The Units and their component parts
are substantially identical to the units to be offered in the IPO except that: (i) the Units and their component parts will be subject
to transfer restrictions, except in limited circumstances, until 30 days following the completion of the Business Combination, (ii) the
Units and their component parts are being purchased pursuant to an exemption from the registration requirements of the Securities Act
and will become freely tradable only after they are registered or an exemption from registration is available, and the restrictions described
above in clause (i) have expired.

 

10.
Governing Law; Jurisdiction; Waiver of Jury Trial

 

This Agreement shall be governed by
and construed in accordance with the laws of the State of New York for agreements made and to be wholly performed within such state without
regard to conflicts. The parties hereto hereby waive any right to a jury trial in connection with any litigation pursuant to this Agreement
and the transactions contemplated hereby.

 

11.
Assignment; Entire Agreement; Amendment

 

10.1 Assignment.
Neither this Agreement nor any rights hereunder may be assigned by any party to any other person other than by Subscriber to a person
agreeing to be bound by the terms hereof, including the waiver contained in Section 7 hereof.

 

10.2 Entire Agreement. This
Agreement sets forth the entire agreement and understanding between the parties as to the subject matter hereof and merges and supersedes
all prior discussions, agreements and understandings of any and every nature among them.

 

10.3 Amendment. Except as expressly
provided in this Agreement, neither this Agreement nor any term hereof may be amended, waived, discharged or terminated other than by
a written instrument signed by the party against whom enforcement of any such amendment, waiver, discharge or termination is sought.

 

10.4 Binding upon Successors.
This Agreement shall be binding upon and inure to the benefit of the parties hereto and to their respective heirs, legal representatives,
successors and permitted assigns.

 

12.
Notices

 

11.1 Notices.
Unless otherwise provided herein, any notice or other communication to a party hereunder shall be sufficiently given if in writing
and personally delivered or sent by facsimile or other electronic transmission with copy sent in another manner herein provided or
sent by courier (which for all purposes of this Agreement shall include Federal Express or other recognized overnight courier) or
mailed to said party by certified mail, return receipt requested, at its address provided for herein or such other address as either
may designate for itself in such notice to the other. Communications shall be deemed to have been received when delivered
personally, on the scheduled arrival date when sent by next day or 2nd-day courier service, or if sent by facsimile upon receipt of
confirmation of transmittal or, if sent by mail, then three days after deposit in the mail. If given by electronic transmission,
such notice shall be deemed to be delivered (a) if by electronic mail, when directed to an electronic mail address at which the
recipient has consented to receive notice; (b) if by a posting on an electronic network together with separate notice to the
recipient of such specific posting, upon the later of (1) such posting and (2) the giving of such separate notice; and (c) if by any
other form of electronic transmission, when directed to the recipient.

 

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13.
Counterparts

 

This Agreement may be executed in
two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when
counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the
same counterpart. In the event that any signature is delivered by facsimile transmission or by e-mail delivery of a “pdf”
format data file, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature
is executed) with the same force and effect as if such facsimile or “.pdf” signature page were an original thereof.

 

14.
Survival; Severability

 

13.1 Survival. The representations,
warranties, covenants and agreements of the parties hereto shall survive the Closing.

 

13.2 Severability. In the event
that any provision of this Agreement becomes or is declared by a court of competent jurisdiction to be illegal, unenforceable or void,
this Agreement shall continue in full force and effect without said provision; provided that no such severability shall be effective if
it materially changes the economic benefit of this Agreement to any party.

 

15.
Headings.

 

The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

 

[remainder of page intentionally
left blank]

 

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This subscription is accepted by the Company on the date
set forth above.

 

	 	SUBSCRIBER:
	 	[       ]
	 	 	 
	 	By:	
	 	Name: 	                           
	 	Title:	 

 

	 	ENTERPRISE 4.0 TECHNOLOGY ACQUISITION CORP.
	 	 	 
	 	By:	         
	 	Name:  	Eric Benhamou
	 	Title:	Chief Executive Officer

 

[Enterprise 4.0 Technology Acquisition Corp. Placement
Unit Subscription Agreement – [    ]]Exhibit 10.6

 

ENTERPRISE 4.0 TECHNOLOGY
ACQUISITION CORP.

533 Airport Blvd Suite 400

Burlingame, CA 94010

 

October 18, 2021

 

First Line Enterprise, Inc.

533 Airport Blvd Suite 400

Burlingame, CA 94010

 

		Re:	Administrative Services Agreement

 

Gentlemen:

 

This letter agreement
by and between Enterprise 4.0 Technology Acquisition Corp., a Cayman Islands exempted company (the “Company”) and First Line
Enterprises, Inc. (“First Line”), dated as of the date hereof, will confirm our agreement that, commencing on the date the
securities of the Company are first listed on the Nasdaq Capital Market (the “Listing Date”), pursuant to a Registration Statement
on Form S-1 and prospectus filed with the Securities and Exchange Commission (the “Registration Statement”) and continuing
until the earlier of the completion by the Company of an initial business combination or the Company’s liquidation (in each case
as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination Date”):

 

(i) First Line or one of its affiliates shall make
available to the Company, at 533 Airport Blvd Suite 400 Burlingame, CA 94010 (or any successor location of First Line or its
affiliates), office space, administrative and shared personnel support services as may be reasonably requested by the Company. In
exchange therefor, the Company shall pay First Line the sum of $12,500 per month on the Listing Date and continuing monthly
thereafter until the Termination Date; and

 

(ii) First Line
hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind (each, a “Claim”) in
or to, and any and all right to seek payment of any amounts due to it out of, the trust account established for the benefit of the public
shareholders of the Company and into which substantially all of the proceeds of the Company’s initial public offering will be deposited
(the “Trust Account”), and hereby irrevocably waives a ny Claim it may have in the future as a result of, or arising out of,
this letter agreement, which Claim would reduce, encumber or otherwise adversely affect the Trust Account or any monies or other assets
in the Trust Account, and further agrees not to seek recourse, reimbursement, payment or satisfaction of any Claim against the Trust Account
or any monies or other assets in the Trust Account for any reason whatsoever.

 

This letter agreement
may not be amended, modified or waived as to any particular provision, except by a written instrument executed by the parties hereto.

 

No party hereto
may assign either this letter agreement or any of its rights, interests, or obligations hereunder without the prior written approval of
the other party. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer
or assign any interest or title to the purported assignee.

 

This letter agreement,
the entire relationship of the parties hereto, and any litigation between the parties (whether grounded in contract, tort, statute, law
or equity) shall be governed by, construed in accordance with, and interpreted pursuant to the laws of the State of New York, without
giving effect to its choice of laws principles.

 

[Signature pages follows]

 

     

     

    

 

	Very truly yours,
	 
	ENTERPRISE 4.0 TECHNOLOGY
    ACQUISITION CORP.
	 
	By:	/s/
    Eric Benhamou	 
		Name: 	Eric
    Benhamou	 
		Title:	Chief Executive Officer	 

 

AGREED TO AND ACCEPTED BY:

 

	FIRST LINE ENTERPRISES, INC.	 
	 	 	 
	By:	/s/
    Steven Fletcher	 
	 	Name: 	Steven Fletcher	 
	 	Title:	Chief Executive Officer	 

 

[Signature Page to Administrative Services Agreement]

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