Rear Diffuser Brake Light Wiring Install Help

[mrp1]

Wondering if anyone has installed a rear diffuser with a brake light on a B9 Sportback and if so, could help me on how to wire it because I can't find any posts/videos anywhere on how to do it. Thanks!

[SLYCAT]

Hope this helps, check time code 2:05. Good luck.

https://www.youtube.com/watch?v=fgHwiXSFcWA

[mrp1]

I saw his video prior to posting this and he it's somewhat helpful. I've had people tell me when i take my OEM diffuser off there should be wires possibly already so that's the kind of process I'm looking for, not through taking one tailight out and etc. but thank you!