Replaced my RCD510 with an RCD330+ in my amarok recently

Loving it but having problems with my reverse camera. All wired up but getting no signal/image or any kind of response on the display.

Camera is wired up and gets power as the lights on it activate in reverse and headunit VCDS coding has been done.

Can't find anything on the net so hoping someone here has got an aftermarket camera to work with theirs and can let me know how they've wired it up!