Thanx Andy

Yes, pretty standard

If this is a standard three-phase voltage regulator/rectifier (3 white AC wires in 1 red DC wire out) this is the positive terminal to be connected with. Regulator needs ground as well, so usually there is a grounding cable from one regulator fastener to battery ...

Any advice would be appreciated please:
Issue as follows. had a couple of times now where the engine management light comes on and within a minute or so the motor cuts out. The battery at that point is flat. So when, after charging the battery, I run tests everything seems fine. The 3 white wires at ...