86 Stang GT G3 Alt Wiring needed. Confused.

There are wiring diagrams on veryuseful.com. The white wire is simple, it goes from the 3 wire pigtail right back into the alternator. It controls the field current. The yellow wire supplies continuous hot power from the fuse box. The green wire goes into the dash and through the dummy light in the dash, and then to a hot source on the ignition key. It turns the alternator on. The large wire just has to go to the positive battery side somewhere. Very simple to wire.

Kurt