This cable fits either the V3 AutoTrickler or V3 AutoThrow motor.
The motor end of this cable includes strain relief heatshrink to keep it from bending. Avoid flexing the ends and ensure this stays in place. Always disconnect the cable before moving the AutoTrickler to empty powder in order to avoid flexing the ends.
If the motor is shaking in place and not turning, the most likely reason is one of the four wires in this cable is broken. Check both ends of the cable and try swapping the cable between the AutoThrow and AutoTrickler to narrow down the source of the issue.