I'm down there right now but I can't find any retainer clip. The torsion bar slides back about 1/4" until it is flush with the rear end of the holder that is welded to the cross member.
Which side is the clip supposed to be? Maybe it's missing?
Maybe the PO never re-installed the clips as looking at the strut rod damage, I figure he removed the LCA (or at least pushed it and the torsion bar back sufficiently to remove the strut rod). Or it could be the clips are just so covered with grease you can't see or feel them?