I bought two bikes, not running, off craig's list. The one had the throttle and brakes assembly was gone. I lucked out of this bought both, replaced and it worked. the second bike had a fried controller. This unit runs on 24 volt nicads, placed under the seat. I purchased a crystalyte controller and can not figure out how to hook up, the bike has 5 wires coming out of the motor (rear), the controller has only one three wire connector, Oh what to do ??