90 Fox battery cutoff switch

I've read and searched and still can't quite find the answer.
I've got a 90 Fox with a 3G alternator and I am trying to get my battery cutoff switch to work.
The switch I have is a 4 post like this Moroso.
http://www.moroso.com/catalog/images/74102_inst.pdf
If I wire it up like it shows on the picture the battery doesn't charge.
I have one wire coming off the post on the back of the alternator going to the smaller post on the switch.
If the wire is moved to the bigger post that goes to the solenoid it does charge but it does not shut off when running.
I have a feeling I am missing something small to give some feedback to the regulator to charge.
Thanks for the help.

Now that I think about it I am surprised the car hasn't burned down.
Is it pushing 130A down that wire to the switch?
Previous owner not me was running this setup.

So looking at this diagram from jrichker.
http://www.stangnet.com/mustang-forums/777207-battery-cut-off-switch.html
If I run a 4ga wire off the post on the alt to the starter solenoid and then cut the green/red wire and run a couple back to the switch that should be good?

I got it working. Thanks for the help.
Turns out my switch had ***** the bed. Probably because of the previous owners install job.