The shaft is located on the right 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.
The rotating rod outside the motor is called the shaft, and you can change the motor's direction of rotation with a key. By attaching suitable parts to the end of the shaft, you can use the motor in your circuit as desired.