So I finally bought the Flipsky AS and JETI 5.5 and 8 mm AFC AS connectors.
The Flipsky AS looks good, but is actually rated only 150A continuous. Wires are AWG12, and look tiny for my (supposed) need. I would be concerned it would start a firework inside the ammo box…
I’ve finally chosen the JETI 8 mm AFC connectors. They are great. No spark anymore. Tested several times. I think it’s the way to go for more than 18S.
I’ve also found these 8 mm connectors are very easy to solder with AWG8 wires.

