...
XT90i - Only vbatt and 2 pins, needs one more
AS150U - good but kinda large
Xt60i - exists for size but only has one extra pin
XT60(2+4) - might be motive? 5pair Amass XT60 (2+4) Male Female Plug Connector with Signal Pin and Sheath Solder Wire Model Accessories - AliExpress 26
Revelation: Just google 2+4 connector and the results are plentiful
Considerations
Look fore more unknown Amass connectors
Look into round connectors with power on outside and pins on inside?
Consider putting power across multiple pins to get to the right current
Dimensions of ones that are good enough
AS150U
XT60(2+4)
Cant find?