I have no familiarity with this piece, but just from looking at your photo, here's what I think I see:
- The cable does not appear broken or even damaged
- The release lever appears to have a "hole" in it to receive the end of the cable, just like a brake lever on a bicycle
So it seems to me that you may just have to move the lever down to the point where you can slip the round end of the cable back into the lever from the side, then align the bare cable into the slot coming from the hole.
I could be wrong, but this looks like an easy thing to try, and perhaps a very easy fix.
-David