Data taken from Ian Simpsons original article:

PIN 1: Live wire to fuel pump (This is the thick white wire on the white plug that goes to the fuel pump)
PIN 2: Earth (this can bolt straight to the body)
PIN 3: Rev Counter (This is the pink wire from the 3 pin plug on the AEI) Split the wire so that it connects to here, the AEI and into the car)
PIN 4: UNUSED
PIN 5: Ignition Live
PIN 6: Battery Live