Need Alternator help

I need some assistance with Alternators. The V-belt set up that the PO had installed used a make shift alternator bracket, although it worked, it was just a mess to look at. So I purchased a serpentine kit from CFV Racing, the 8 rib serpentine kit for alternator only.

Small Block Chrysler Serpentine Conversion, Alternator Only

So I start to remove everything out of the way and when I get to the alternator, I find out that the PO had used a autolite alternator with internal VR. The serpentine kit supplies the pulley for the alternator and it is Mopar specific so I do not want to try to put this pulley on the old alternator since it won't allow me to use the external cooling fins already on the old alternator, I need to use a mopar alternator that has the cooling fins internally.

I found a few Powermaster alternators that have an internal VR and since the original VR is long gone, I want to keep the wiring the same. But when I was looking at the wiring from the old alternator, I see that there are 2 wires coming off a plug in pig tail connector on the back of the old alternator, one goes back to the Battery lug on the old alternator and 1 wire shoots into the wiring harness. This obviously is not using the original wiring harness to accomplish,

I found information on-line that says that this connector can have the #2 terminal of the pigtail running back to the battery lug to excite the internals of the alternator and the #1 terminal is used to connect to the dash warning light?

Wiring up the GM 10SI Alternator

At this point I got lost, I am not sure where this other wire is going since there is no dash light in my instrument cluster? I put a toner on it and I pick it up on the drivers side in a part of the wiring harness on a green wire that has been cut and a resistor attached between the wires for some reason. When I check my service manual, it says that a dark green wire in the harness is for horns. When I go inside the car. I pick the tone up on the black wire attached to a lug on the back of my instrument cluster for the alternator gauge, getting confused yet..I know I am.

When I get the Mopar replacement alternator with Internal VR, where do I connect the wire that runs back into the wiring harness that was coming out of the old alternator?