1.7 alfa-boxer contactor-less distributor wiring help needed

[knighty]

I have a late 1.7 alfa boxer 8v carbed engine, with hydraulic heads, from a G plate 1989 alfa-sud, of which I'm putting in my kit car......the distributor is the type without contacts, its has the bosch electronic system, but still with a vacum advance, there is a 3 pin socket on the side of the distributor, which i think is the spark generator/position sensor......what do each of the 3 wires do, and where do I need to route them to, I obviously have a coil with +ve and -ve terminals too, but I dont have a clue how to link the 3 distributor wires the the coil and ignition feed.

The bosch part number is 1227022031

I have since noticed the pins on the female socket (with the wiring on) are numbered 1, 2 and 3.......1 being closest to the flywheel, and 3 being furthest from the flywheel....... the wire colours I currently have are:-

1 = white
2 = black
3 = green & black

the female connector with the wires on actually has the Ford logo mounded in it so I'm dubious if the wiring I have actually came from an alfa!

I'm sure this is an easy question for someone to answer