I've had a look today and the grey connector block at the bottom of the pic has the 2 black wires from the alternator going into it corresponding with a Brown/Yellow wire and White wire on the opposite side of the connector which has 7 pins in total. The odd thing is that another Black wire opposite a Blue/Green wire was clipped out of the way by the coil pack...but it's the same size wire, connectors and heatshrink so I presume was done at the same time as the other 2, but disconnected (it's long enough to reach the alternator...! Had another look at the alternator, but can't se any marks near the terminals. Thanks Nick Oh, not got round to testing the voltage on those alternator connections yet, but I will...