I got a Team Scream lipo (1800mah 2S2P) in a trade and it has that same connector with the clamp. It seems to fit Hyperion balance tab, that connector actually has a little raised area for the clamp but I can't get it to work and show both 'cells' on the charger - keep getting conn error so that may not be the right balance conn either.

I tried reading the cell voltage with my lipo checker and it won't either. This lipo's balance wiring must not follow standard wiring.