Here is an excellent 36 volt 1000 watt universal voltage/speed controller for electric scooters, bikes, go-karts, and mopeds. This controller has eight connectors: Battery, Motor, Charger, Lock, Throttle, Brake Connector, Brake Light, and Pilot Lamp.

This controller uses a 3-wire throttle, and it is compatible with most 36 volt products equipped with 600-1000 watt motors. However, it is not compatible with 4-wire or Currie 5-pin or 6-pin half grip throttles. The throttle wiring is listed in the Specifications below.

In addition, you might need to cut and splice a few but not all of your old controller connectors.

Controller connections as follows:

Battery Connector (Black & Red Wires, Thick)
Motor Connector (Blue & Red Wires, Thick)
Charge Connector (Black and Red Wires, Thin)
Power Locks Connector (Blue & Red Wires, Thin)
To Put Connector (Red, Black, & Blue Wires, Thin)
Brake Connector (Black & Yellow Wires, Thin)
Brake Light (Black & Red Wires, Thin)
Pilot Lamp (Black & Red Wires, Thin)