Too many ground connections?

Bottom diagram correct BUT feed the camera from the rev light bulb feed, surely that's 12V+ thus eliminating the relay. That's how I always do it.

Your suggestions make sense for 99.99% of backup installations, but on my car (2009 Cayenne), for reasons I am not sure why but the manufacture intended, the backup video is displayed for up to 30 seconds after the car is taken out of reverse, or less if the car gets over a certain forward speed (6 MPH), the parking brake is applied or a different input is manually selected on the display, such as the radio. If after the 30 seconds the reverse display is still showing, the display automatically returns to the last display before the car was put into reverse. If I powered the camera with the reverse bulb, the video screen would be blank for those 30 seconds. I needed the relay because the wire that tells the camera to turn on and off is only 6.5 volts, whereas the camera is rated 12 volts. I probably should have tested the camera to see if it would work on 6.5 volts but I forgot to do that. If the camera would work on 6.5 volts, I could have wired the camera directly to the 6.5 volt camera on/off wires and skipped the relay. On another note, here is a screen shot of the backup camera in action. Thanks.     

OK, maybe I missed that earlier.

Hi,...i am a new user here. As per my knowledge they are designed to illuminate behind the vehicle to aid the camera vision, and if you have it ON all the time, won't the light hurt the eyes of drivers behind you while you are driving forward? The license plate illuminators usually have a cover to prevent the light going straight behind, and illuminate only the license plate area.

The license plate light points down and illuminates the license plate only. It does not shine backwards nor assist the rear view camera. Other backup cameras may have assist lights that point backwards and illuminate when the backup camera is on, but not this one. Thanks.