Hey, I have a quick question.... I cant seem to figure out how to connect the 7pin.. I have the brake controller and the 7 pin on the truck... And i have brakes on the trailer, but the trailer only has the 4 pin connected. I want to put the 7 pin on... How do I run it... In the diagram you will see how I ran the 4 pin. And you will see the colors for the 7 pin, they dont match up. I was hoping to just cut the brown, green, and yellow wires for the 4pin and be able to hook it up to the 7pin, along with the brake ones... So will I be able to do so? or will I have to run all new cable? Thanks in Advance!