You'll need to be able to see the head of the
square head screw and get a screwdriver on it, 1' should work.
Try this first, worked for me.
Extend the slide
but release the switch before the slide stops, then retract
but release
before the slide stops.
It this work repeat
Extend 4" retract 2", repeat for a foot.
If that doesn't work try this.
Unplug the the harness to the broken motor from the controller.
Have someone operate the extend switch, release the switch after the slide moves a
few inches.
Then push the broken end of the slide out as far as you can.
Hit the extend button again, then PUSH again, ...
If you have some strong help push the button and slide at the same time
Good luck