How about a connector that is made for harsh environments? It might be heresy but a heavy duty vehicle connect would probably work, wouldn't be too expensive, would resist water & dirt ingress, and would be easy to separate even with gloves on. Something like a
Deutsch DTM series should work well (go with the solid contacts, they have lower resistance.)(Batts Racing isn't the cheapest source, but they make it much easier than trying to figure it out from
Deutsch's site.) Add a drop of NyoGel 760G on each contact and the connector should last forever and wouldn't vibrate apart. Just an opinion from someone who designs electronics for harsh environments.