I make my battery wires different lengths so that the connectors have no chance of accidentally bumping together. With my red wire (with female connector) longer than the black wire (with male connector) someone would really have to try to short them out. Since I'm the only one who handles my batteries, I don't see any problems.
Thanks for the advice! I installed the 8mm bullets on my Mamba XL and Lipos. A male and female on each. Does connecting and pulling apart get easier after a few times? These things are tight!