The MiniBMS has a simple single wire control for both HVC (high voltage cutoff) and LVC (low voltage cutoff). Basically, if the keyed input (12v) is off and any cell goes to too high (from charging) the end board cuts off the charger (through an AC relay). Then if the keyed input is on (driving) and any cell goes too low a buzzer sounds and ya gotta pull over. The end board can also be wired to cut the throttle in half. This is the BMS end board in a plastic box and the charger relay, not the neatest but pretty good considering all the things right there.
The tests for the buzzer and charger shut off went great. Now the only thing left on this EV is a vacuum pump, which really isn't needed because the disc brakes work really well. Here is the area with the lids on both the BMS and main control box.