I'm in the process of doing this, and the red wire (brake sense) says to "wire into the cold side of the stop lamp switch or brake light." Most people say to find the brake switch wire under the dash and tap into it.   With the very small wires under the dash, tight wire routing, and limited access, and since I'm already running the blue electric brake wire to the connector at the back of the car, I was thinking about just running that red wire back with it, and tapping into the brake light wi