There are three termianls the two large ones are the charge to the battery the small one I think it is a 1/4 spade is the exciter also refered to in one diagram as alt proving. there is one termanal seperate from the otheres that one had a noise supresion module on it on one of my alt. Do you have any wiring or vacuum diagrams I can send you links to were you can get some.
P.S your not crazy you just have too much time on your hands
What motor are you using?

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89 Ford F3504x4CC 7.3 IDI turboed Intercooler and running on wvo now powered by a 1997 Cumins
87 300SDL on bio and wvo killed by chevy truck 5-24-06
1999 E300TD black with gray int.