Got it working!

Installed the rear view camera for the big tractor. About time as I bought it early in the spring after discussing my neck problems with the occupational health service.

It took some time as I started installing it after lunch, having done some regular service in the morning. I thought it would (that's why I didn't get around to doing it earlier) and in the end there were some issues to deal with. I had accidentally connected one wire wrong, but the odd part was that the display didn't need the trigger wire to work and its buttons don't work (same problem with the camera in the van). After getting the camera to work, the display worked otherwise well though and the image quality seems adequate.