Is this what pulled off the wall?
Ours did not pull out, but I noticed that it was deforming the wall since there is only a thin piece of aluminum behind the paneling.
I took care of it myself by anchoring the pulleys to an aluminum plate that attaches to the top wall tubing and the tube above the slide opening. I did both sides:
The top screws are noticeable only if you look for them above the slide trim.