5. After removing the seat we disconnected the negative battery terminal. Depending on your specific setup the final wiring may vary. The instructions directed us to attach the supplied red extension wire with the inline fuse box (A) to the red wire of the main harness. Then use the supplied connector (B) to fasten the red extension wire to the 12v accessory wire. Then to ground, we attached the black extension wire (C) to the black wire of the main harness and then fastened the terminal to the negative battery post.