Hey guys, I’m looking for a little help with the wiring I’m doing for some underglow I’m fitting. I would like for the lights to come on with my ambient lighting and/ or be controlled by the brightness scroll **** that controls the brightness of said ambient lighting. The light kit I bought come with the smart brake function which I am wiring to the brake light in my trunk(I’ve already run the wires for this).

does anyone know which wires I would need to splice to make this happen?
(Opening up my dash is not an issue)