By looking through some Endless Shpere postings, I realized that using 2N wires (N= number of batteries) is N-1 wires more than needed. You really only need 6 wires for 5 batteries (N+1). I show a PakTrakr connected too, which is of course optional. I thought this might be helpful for anyone that wants to do bank charging on a scooter. This is a five battery example. They are doing this type of setup with up to 16 a123 batteries over on ES. If I can find a good 6 wire connector, I may change mine to use just the required wires.