Need better connectors
 

I have two battery setup (parrel), i currently have 5mm bullet connectors, but those are too loose, after few jumps, another battery is loose (disconnected).
Is there any connectors that would have "lock" like tamiya-connectors, but rated for +100A current, deans-connectors i wont use as those are too loose also, so it eliminates traxxas-connectors also.
So im searching connectors that would have "lock" and are rated +100A, dont care if its single or "dual" connector.

Locking battery connectors for those kinda currents dont really exist, atleast not small enough for r/c use.

Deans plugs and traxxas connectors are normally very tight, very rare that they would come apart.

Same is true of bullet plugs; take a small allen key and insert it into hole down the centre of the male connector, then wiggle it around to push out the pins slightly. It should be a much tigher fit into the female connector afterwards.

Only other thing I could suggest is to look at your wiring and shorten it where possible, as less wire = less weight & strain on the plugs...

I think i got problem solved, problem was battery racks that bend after few big jumps and so allowed battery to move, causing bullets to open.
I figured that its better to squeeze female connector, as i cracked one male connector trying to make it fit tighter.