Hello to you all, I hope you are all well and enjoying 2 wheels whilst you are able.
I recently stumbled across this Rudge spares website (https://www.rudge.parts/electrical-equipment.html) and found that they do copies of the small brass Miller electrical connector. It looked very close to the Lucas one that is used on the tail light and battery so I bought 3 for my G3WO project. Having now compared them to the connector on my NOS Lucas WD tail light they look identical. They are also very reasonably priced at £5 each, with the rubber cover.
All I need to do now is find the correct thickness of cable for the battery and rear light. Does anyone have any leads?