The shaft is on the left side depending on the circuit connection direction. Twin DC motors are divided into right and left.
The motor module converts electrical energy into mechanical energy when a signal is received.
It continues to rotate as long as the signal is provided.
Outside the motor, there is a rotating rod. The key is used to change the motor's rotation direction. By attaching suitable components to the end of the shaft, you can use the motor in your circuit as desired.