I ran 2 wires to the back of my car. One wire was the power for the camera, so I could view behind me without being in reverse. The second wire was my trigger wire that was hooked up to the reverse wire. I grounded the camera on a bolt on the trunk lid. I mounted the camera on the bottom side of the reverse light. I actually removed it from the car (really easy), refinished it (cuz it was faded) and mounted it off the car just for easier working space.