[Connected Car] horuscurcino:
For RCC is the same as MitchtheMitch said. Look in the document you posted there are "debug" lines on these pins. By the way, the LAN connection was not possible here using USB to Ethernet adapters (tried 3 different models/vendors). I think bosch submit to the test center an unlocked unit to make the certification tests possible.

Found this on "passwd" file from NAC firmware.

It shows all the registered users for this unit to use the linux environment

The structure says:

USER:X or * if a password is assigned:user directory

root::0:0:root:/home/root:/bin/sh
daemon:*:1:1:daemon:/usr/sbin:/bin/sh
bin:*:2:2:bin:/bin:/bin/sh
sys:*:3:3:sys:/dev:/bin/sh
sync:*:4:65534:sync:/bin:/bin/sync
games:*:5:60:games:/usr/games:/bin/sh
man:*:6:12:man:/var/cache/man:/bin/sh
lp:*:7:7:lp:/var/spool/lpd:/bin/sh
mail:*:8:8:mail:/var/mail:/bin/sh
news:*:9:9:news:/var/spool/news:/bin/sh
uucp:*:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:*:13:13:proxy:/bin:/bin/sh
www-data:*:33:33:www-data:/var/www:/bin/sh
backup:*:34:34:backup:/var/backups:/bin/sh
list:*:38:38:Mailing List Manager:/var/list:/bin/sh
irc:*:39:39:ircd:/var/run/ircd:/bin/sh
gnats:*:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh
nobody:*:65534:65534:nobody:/nonexistent:/bin/sh
xuser:x:100:101:Linux User,,,:/tmp:/bin/sh
messagebus:x:101:103:Linux User,,,:/var/lib/dbus:/bin/false
pulse:x:102:1000:Linux User,,,:/tmp/home/pulse/:/bin/false
polkituser:x:104:1002:polkituser:/var/run/polkit:/bin/false
Org:x:0:0:org.genivi.NodeStartupController1:/:/bin/false
SerGet:x:0:0:serial-getty@:/:/bin/false
sysdquot:x:0:0:systemd-quotacheck:/:/bin/false
dbuspub:x:10678:10678:dbus-public-bus:/:/bin/false
Dbu:x:0:0:dbus:/:/bin/false
dbssess:x:0:0:mm-dbus-session:/:/bin/false
rngd:x:10100:10100:rngd:/:/bin/false
hkdiag:x:10041:10041:diag-svc-plf-coding-daemon:/:/bin/false
rescue:x:0:0:rescue:/:/bin/false
console:x:0:0:getty@:/:/bin/false
systime:x:10014:10014:restore-system-time:/:/bin/false
quotaon:x:0:0:quotaon:/:/bin/false
persist:x:0:0:pas-daemon:/:/bin/false
persVlow:x:10090:10090:vlow-container-svc-daemon:/:/bin/false
systemd:x:0:0:systemd-exit:/:/bin/false
lcnsm:x:10010:10010:node state manager:/:/bin/false
lcnsc:x:10012:10012:node state manager:/:/bin/false
lcnhm:x:10567:10567:node-health-monitor:/:/bin/false
audmgr:x:14573:14573:media-audiomanager:/tmp/:/bin/false
audpls:x:10020:10020:pulseaudio:/var/run/pulse:/bin/false
audalsa:x:10573:10573:alsa-state:/:/bin/false
audsnd:x:10311:10311:media-soundgen-ref:/tmp:/bin/false
media:x:10030:10030:oip-media-timeshift:/tmp:/bin/false
video:x:10222:10222:splash:/:/bin/false
contel:x:10040:10040:oip-pi-telephonyservice:/:/bin/false
concb:x:10039:10039:oip-pi-contactbook:/:/bin/false
conmsg:x:10038:10038:oip-pi-messaging:/:/bin/false
conml:x:10053:10053:oip-pi-mirrorlink:/:/bin/false
conbrw:x:10037:10037:oip-pi-wbf:/:/bin/false
concm:x:0:0:connman:/:/bin/false
conwf:x:0:0:wifi:/:/bin/false
conusb:x:10001:10001:usbmgr:/:/bin/false
conbt:x:10042:10042:bluetooth:/:/bin/false
conphnpl:x:0:0:oip-pi-phoneplugin:/:/bin/false
swlman:x:0:0:swl-manager:/:/bin/false
mchineid:x:0:0:machineid:/:/bin/false
Key:x:0:0:keyprovider:/:/bin/false
udisks:x:0:0:udisks-daemon:/:/bin/false
persftop:x:0:0:top:/:/bin/false
firewall:x:0:0:iptables:/:/bin/false
graphic:x:10501:10501:wayland:/:/bin/false
ltsyslog:x:0:0:syslog-ng:/:/bin/false
ltdlt:x:10006:10006:dlt:/:/bin/false
ltdltsys:x:10007:10007:dlt:/:/bin/false
ltdltprint:x:10008:10008:dlt:/:/bin/false
persubi:x:0:0:ubi-attach2:/:/bin/false
NhmRec:x:0:0:nhm-recovery:/:/bin/false
NrmRec:x:0:0:nrm-recovery:/:/bin/false
VloSvcRec:x:0:0:vlow-svc-recovery:/:/bin/false
inptouchcal:x:0:0:oip-ssw-touch-calibration:/:/bin/false
slwmdutl:x:0:0:SWLD user:/:/bin/false
swlopkg:x:0:0:SWLD user opkg:/:/bin/false
SysUpdUtmShu:x:0:0:user update:/:/bin/false
conhfc:x:10568:10568:Handsfree Service:/:/bin/false
usbmux:*:10570:10570::/:/bin/false
concedc:*:10571:10571::/:/bin/false
lcnrm:*:10572:10572::/:/bin/false
fws:*:10573:10573::/:/bin/false
radio:*:10575:10575::/:/bin/false
i2c:*:10578:10578::/:/bin/false
infdat:*:10580:10580::/:/bin/false
phm-fsuc:*:10582:10569:phm-fsuc:/:/bin/false
persNba:*:10587:10587:Pers - NBA daemon:/:/bin/false
persVlow:*:10589:10589:Pers - Vlow container daemon:/:/bin/false
persHwi:*:10590:10590:Pers - HWInfo container daemon:/:/bin/false
persErly:*:10591:10591:Pers - EarlyData container daemon:/:/bin/false
persScrd:*:10592:10592:Pers - SecuredData container daemon:/:/bin/false
persIio:*:10594:10594:Pers - ImageIO ():/:/bin/false
condhcp:*:10596:10596:Conectivity DHCP daemon:/tmp:/bin/false
conaap:*:10598:10598:oip-connsvc-androidauto:/:/bin/false
usrprfmgr:*:10599:10599:User Profile Manager:/tmp:/bin/false

The only one not assigned as you can see is root user. But anyway it gaves me errors when trying to log in without password.

Unfortunately i cannot find the "shadows" file where the passwords are supposed to be stored in.

Found another file saying the password for some instance is "files" without quotes. Can you test it for those usernames?