On the interior side of the harness (after removing power those wires). I ended up cutting off a large portion of the harness.
I shortened, connected, and sealed 3 of the 4 wires.
The 4th wire is the illumination wire, I was about out of time so I'll save that for another day. I wrapped it around the harness and tapped it up.
All hooked up ready to go.
The light bar logo still goes on and off with the light itself. Considering the interior backlighting is an orangish color I'm not a big fan of the blue.