Jason, read through this article
http://www.mustangcentral.net/tech/alternator.html
It is for an EFI one, but should help out a bit. If I remember correctly, the small wire from that plug is jumped over to the spade connector, then the other 2 wires are actually just 2 10ga wires that get tied together. The article says they go to the solenoid, but also has a fuseable link inline.
http://www.fordmuscle.com/archives/2...e/index2.shtml thats another good article. If you don't have those wires, you should have stuck with EFI! lol good luck
-Drew