It sounds like you have the DRVM connector (tow mode camera) and not the 12-pin?
They are separate systems so it's not just replacing a cable. The DRVM is fed from the cargo cam housing (has the cargo and rearview cams) and bumper Fakra (coax) connector. The 12-pin is fed to the UC5 radio module.
RAM sold an XFQ kit at one time, at least for the HD trucks,
@Phil T installed one in his 19 HD.
You really should review the camera stickies in the mod forum, and by all means, reach out to
@Jimmy07 for help with an accurate parts list, options, and coding if you're looking to add or change things up.
IMHO, the DRVM Tow Mode Camera (wired) is a better option as it has always on display in the DRVM, and tilt, etc.
If your truck has surround, and the 12-pin, You can use Aux2 for an analog camera. Aux1 is expecting the Trailer CVPM surround feed though with AlfaOBD you can change it to show AUX1/AUX2 instead of trailer surround. Be aware any feed to the radio is going to go away after 8 seconds over 8MPH unless you install a box like the Naviks, so the trailer surround or analog camera is really only useful for backing without one. I believe TaserDT can also enable always on backup/trailer cams. No disrespect to them, but not sure if Infotainment offers anything similar.