The hard part was getting cabling past the wheel well.
My camera mounts on the license plate. To get power, I tied into the backup light on the driver's side with heat shrink solder connectors. By connecting to the reverse lights, when I put the truck in reverse the camera turns on.
To get past the wheel well, I drilled holes into the well and zip tied the cable. If memory serves, I used three zip ties. I came into the cab through the same drain that I had used for the main unit, which as I stated above came from the battery.
It's the kind of thing that would be easy to do the second time, but it requires a lot of on the spot engineering no matter what. There are plenty of YouTube videos to watch, without which, I wouldn't have been able to do this. Watch a couple before you decide against it. Also, invest in a good camera.