1. The "Bolt (it is a SCREW)" is removed from the OUTSIDE. There is NO inside screw/bolt.
2. The only time you need to manually retract or even manually move the room is when it fails extended, which gives you access to that motor screw
3. That screw is NOT mounted to the motor, it is inserted into a cavity cut out of the motor case to prevent the motor from lifting UP. The motor is still free in its mount to wiggle.
4. The BEST way to manually retract is, to find and note where your control modules are. Each module has a motor wire connection(2). Disconnect each motor connection, get 3 or 4 people and manually PUSH the room in. Takes muscle, but it can be done. Once retracted, reinstall the 2 motor plugs. That keeps the room locked.
5. IF this is not what you can do, remove that motor screw pop the motor UP out of its mount and disconnect the motor from its harness. Put the system in override and then retract the room using the other motor. Stop every 6 inches and manually pull the end IN that has no motor or have someone pushing from the outside as you use the other motor in override. Doug