I figured ot how to take the cable off of the roof mechanism

BOINK! I have only been looking at it for three days. The good news is that the sunroof operates fine by hand. Opens, closes fully, tilts up. Looks like the cable is hung up somewhere because it lands about an inch and a half short of the closed position. Any ideas? New cable...take the headliner out(ugh)...something with the motor?