One wire GM style alternator wiring help needed.

It is one wire from the alternator to the relay to the battery. There is only one wire on the alternator that heavy black one. The alternator turns on by itself at 800 rpms. No extra wires needed. One heavy wire right to the battery. You do not need the relay unless you want to shut it off manually when racing. Look at the pictures . I only needed a 8 inch wire when I installed it . When I installed the relay I added another heavy wire and the small wires to a toggle switch to split the heavy wire and stop it from going to the battery source. You only need one wire to the battery.