I grouped the wires into relevant bundles and pulled them through PVC sheathing and cable tied them to the frame. All wires ending at the headlamp end were labelled to make things a lot easier when it is time to connect them in the headlamp shell.
I think it looks tidy enough. I should get the fork stanchions back next week and then I can rebuild the front end and complete the wiring. Then the bike will be almost ready to start! first time in many years I am sure. I bought the frame in Asturias and the engine in the UK and the other parts from as far afield as Germany, France, UK, Canada and Malta.