2010 Tundra 5.7 driver side tail light assembly wires

Hello everyone,

I am wondering if anyone can help me identify which of these wires go to the rear driver side stop light please?

I am trying to connect a third brake light for an ARE camper, which has two positive wires and a ground wire. One of the + wires is for the brake light, and the other one is for the interior light, which I plan to connect to the switch that turns on the truck bed light mounted on the cabin.

The picture is from the wiring harness that connects to the driver side tail light assembly.

Thanks!

This is a single cab SR5 Tundra what I bought less than an year ago.

 

Take a look at this:

I'd have to pull my light to see exactly what I tapped in to when I did mine. Let me know if you need more info.