For the highline camera, there are connections to the can network at the radio connection, plus there is a connection to the steering angle sensor at the BCM which allows the lines on screen to move with the steering wheel. There is a power lead to the camera, and a video lead that runs to the radio.
Coding is needed in can gateway (to tell car that a camera module is fitted), also
coding needed in the steering angle sensor module and also the infotainment module to allow display, and integration with the park pilot already in the car. Be aware that the camera will then work fine, but will throw an error code up until the camera module is properly calibrated, and being a non-genuine camera unit, calibration might not be possible with VCDS (as I found with mine)