Fundamentally, only one motor can be connected to an output. For this purpose, it is mandatory to note the motor manufacturers’ technical data. There are motors that permit parallel operation of two motors, but they can then only ever be activated in pure parallel operation. In case of non-observance, internal reverse voltages between the two windings in the motor will negatively affect the two motors connected in parallel.
There is a danger that limit switches can be welded in the motors.