Just finished installing on my 2020 2500
Once you enable the camera using Alfaobd a switch appears on the radio screen, see instructions on the
Kaodtech.com site. The most difficult part is installing the wire harness from the camera to the dash, which requires adding wires with connector pins into 2 different connectors, one behind the rear side trim panel just below the headliner on the driver side and the other one behind the removable trim panel left of the head light switch. I just checked Ebay and none available with the correct connector. I made the mistake of first purchasing the wrong one. There appear be 2 connector types, one is coax and one is a 6 pin connector, both were listed with the same part number. If you find one listed on Ebay, look closely at the picture of the back side, if it has a single 1/4 inch tube sticking out at about 33 degrees just to the left of the white connector, its Not the one you want. Needs to look like the attached image.