Where you located?
The 4a alternator is on the passenger side, I made my own loom up and connected them under the dash by using the engine bay wiring so off the top of my head I don't know the wire.
http://www.rollaclub.com/board/topic/32668-trevs-4ag-ae71-sedan/
I think I still have an ae71 cluster here somewhere so I will find it out and have a look.