Well. It's been a year. Soldering wires together then heat shrink worked. I ride my bike daily in all kinds of weather (but not in a coastal area). This is the first time I haven't had to fiddle with my connections for a year.
I wanted a removable connection from the dynamo to the lights and the Sinewave phone charger but figured that if I really needed to remove wires I could just snip them and start again.
I've tried various connectors over the years and covered them with grease but they always seemed to have some issue. Probably over sensitive to the low voltage involved in a dynamo hub.
All the responses were very enlightening (being an engineer myself working with control systems) .
I feel like a semi-idiot for fooling around with aluminum connectors before.
Last edited by boomhauer; 06-11-21 at 03:26 PM.