Hyperion EOS 0610inet charger

Hello, I could use some help with a wire location problem. I just started building my own A123 packs, they are 4S1P packs. I decided to install the balance wires while I build each pack. OK the pack is done and I have a female connector for a 4S1P which has 5 wire connections in it. Each wire is labeled on my pack 1 thru 4 and one black wire for ground. My problem is I don't know where to place the ground wire!!
I thought I could determine this by looking at the balance plug in bar that connects to the charger, but I'm not sure. The charger and balance bar can be seen at http://media.hyperion.hk/dn/eos.

The negative wire connects to the ends of the batteries opposite the power leads-on the SPT, you need only solder the wire onto the "gold bar" that connects the two cells.

The negative wire connects to the ends of the batteries opposite the power leads-on the SPT, you need only solder the wire onto the "gold bar" that connects the two cells.