Old Series 4 AVR for Stamford

Hello,

I've got an old series 4 avr for Stamford and I want to apply it on my alternator.

The problem is that I don't know how to connect it.

The connections are:

1 2 3 x P4 xx P3 P2 9 P1

I don't also have the wiring for my alternator. Actally what I want to know is, what voltage signal correspond for each conection..( I think this avr is 3 phase sensing..)