While looking about the Matchless it was noted some of the wires on the alternator looked a little cracked. Well, the wire has died, in places, the insulation has gone hard and cracks upon flexing.
A quick search on Vehicle Wiring Products website and I have ordered a length or two of 3 core wire. Plus some crimp on 4.7mm Bullet connectors. I may well be able to unsolder the old ones but I don’t want to make the assumption I can.