If you're going for zero modification to vehicle for lease purposes, you can run a long cable from the front cigarette lighter along the trim seams then around the weather stripping around doors. See my post on how I ran my cables. Granted, my rear camera is not mounted outside but it catches the general gist of what's happening (it's lo-res 480p). I've been meaning to remove the rear trim and attempt to snake the cable through existing rear license plate lights but from photos and videos of the rear bumper removal, it looks like that's not an option.