Does as the Trailer Surround Camera System Option only include the box with the cameras, cables and controller or does it also include the wiring on the vehicle going from the display screen to the connector on the rear bumper? My 2022 RAM Limited came with the Trailer Surround Camera System; however, based on the installation instructions, it appears the system is intended for a cargo trailer, not a travel trailer which I have. I'd like to sell the cameras, cables and controller, but would there be anybody with a truck wired to use those items that didn't already have them?