Low profile Heavy duty super high current 3.5mm connectors.
These are solid brass gold plated connectors, the male part is solid and the female part is sprung through side slits and has a circular spring to assist. Mating is extremely solid and these can carry huge currents. The solder put end will take 10 AWG wire.
These have to be the connectors of choice!!! We have never seen anything half as good before.