Here’s what I did...
If you can’t see it, here’s a closer look
I drilled a hole through the tire mount to run the wire. Here’s a view from the backside.
Then I ran the plate lamp and backup wires together and drilled a hole and used a grommet to protect the wires and give it a clean finished look.
The camera doesn’t necessarily need to be mounted dead center to the vehicle line. But the severely OCD among us may cringe. Any good backup camera will have adjustable parking guidelines to overcome this.
Once adjusted, the guidelines are a bit off-center in the view screen, but they line up perfectly to the parking spot lines.