My rear bumper with swing out came with lights built in so I can't help you there but I installed a rear view camera right under the rear wing/spoiler. I took some time to run the wire through the door but I get a pretty good top down view. I did have to run a wire for the license plate on the...
if you're interested in replacing the whole unit with a Tesla Style radio, Phoenix Automotive sells one for around $600...OR, I did it myself for under 300 with an ebay one .I posted a video in case you're interested. Since yours is a 2006, one of the connectors (the one with the green wires)...