The following connection diagram is given for the proper use of your own stepper motors.
Connections 5 and 6 can be used for mechanical limit switches (normally closed). If the contacts are opened, the PINE controller can detect the start positions of the motors (if activated in the app).
Never disconnect motors from the PINE Controller while it is powered on. Never plug motors into the controller while it is active. This can lead to defects of the internal motor drivers. Always disconnect the power supply before connecting and disconnecting motors.