OK I am not a mechanic and if I go to a mechanic I want to be able to explain everything to him with the parts that I take him. I have the following parts and boxes sitting in my living room and my wife wants them gone and hooked up to the Semi - yesterday........ 1. Direclink braking system 2. 7 pin blade plug in to go to the trailer it also has a 5 pin attached to it for smaller trailers without brakes like my boat trailer 3. 30' of extension wire with all kinds of colored