well since you have two chargers i'd just click negative on the negative bus at the bottom and positive at the positive bus on the bottom and do the same at the top with the other charger.. and then set it to about 57.5 or so and wait a few days... as was mentioned. set the voltage BEFORE HOOKING to the bus. They will run at max amps for a few days.. then they will back off as the voltage approaches the 57.5 area.. of course 3.65X16 cells would be 58.4 but I don't like to pump them up that tight. I wish you success.