Ben,
If you have a multimeter or test lamp, it's easy to find out what all those connections do!
You have the main feed as red.
I'd go for these:
Pos. 1/2: Yellow. Power for radio and minor accessories (only connect if you need it)
Pos. 2: Black. Power for main accessories, like heater and wipers. (connect to white)
Pos. 2/3: Black-Yellow. Power for ignition system (connect to white, see below)
Pos. 3: Black-Red. Power for Starter Solenoid (connect to White-red)
The Black-Yellow on position 2/3 is provided because the accessories and radio feeds are disconnected when the key is in the start position. Makes life as easy as possible for the battery!
However, if your loom does not have separate ignition and accessory circuits, you will have to link the black-yellow to the black wire so that the car will start reliably! Bet that's fooled a few people!
The two pin connector could possibly be for ignition switch illumination, which I guess you won't be using!
Simon
