Have you gentlemen considered Anderson connectors?
https://www.amazon.co.uk/AODOOR-Conn...508347&sr=8-21
As Woody's fuel tank is now in the rear, and I plan on relocating the battery to behind the passenger rear wheel, I have purchased a set of these plugs to put into the fuel filler to jump start/trickle charge the battery without having to get under my truck.
Used these a lot in my motorsport career as they have the added advantage of not having any 'hot' exposed terminals.
Seem slightly safer than the units mentioned above PLUS race car.
P.
