Let me offer some advice on this. I had a CBI bumper on my Tacoma and later decided to add the tire carrier. To make sure it lined up I used the gate to mark the holes where they needed to go. I would not attempt this without using the gate for mock up.
Good luck
Looks good. I sent you a PM. I chose not to tap into any wires. Instead I used a universal trailer adapter to wire the license plate light up to. It plugs right into the existing trailer harness and only took a minute to do. Found the adapter at auto zone for about $7.