Originally Posted by raitheslacker
On the male plug can I solder all three black wires on a together and leave the red wire separate? Or will this short the lipo?
That is guaranteed to short the lipo and possibly start a big fire as well!
Assuming that it's a standard JST-XH balance plug (the type found on most Hobbyking, E-Flite and Parkzone Lipo's), the outer 2 wires on the balance connector will give the total pack voltage. Leave the remaining leads on the male plug disconnected and insulate them so they do not short together.
A handy little wiring 'calculator' to demonstrate typical battery pack wiring with balance connectors.