Both the Left and the Right Motor Ports utilize a 9-pin JST brand female receptacle. Each receptacle is mechanically keyed to assure proper orientation upon plugging in. The motor connector pin-outs are as shown

Pin Description
1 GND
2 Vcc – Hall Effect Sensor Power
3 Motor Winding U
4 Motor Winding V
5 Motor Winding W
6 Hall Effect Sensor U
7 Hall Effect Sensor V
8 Hall Effect Sensor W
9 Optional – Mechanical Holding Brake Control