How to use Imax B6 to balance charge prius battery

Hi everybody,

I just got my new chargers in. I ordered two imax b6's and two balance boards and I can't for the life of me figure out how to charge the prius battery modules. There's a + and - output on the charger and then there are "balance" connectors on it. Seems like RC batteries come with an extra connector that transmits some sort of data to tell the charger how many cells there are. The supermate dc6 seems to be setup the same way. Thanks!