Volkswagen: 1979 Super Beetle- Seat Removal..., hex key, interior renovation

Question
I have a '79 Super that is about to go through a complete interior renovation.  Obviously, one of the very first things that will happen is the removal of the front seats for re-upholstery and to remove the carpet.  All of the guides I've found suggest that there is a "tab" that you must hold down with a screwdriver as you slide the seat back, where it can be lifted out.  However, this doesn't seem to be the case- I see no tab that could be retaining the seat.  What I DO see is a small bolt (hex head on one side, hex key on the other) that seems to stop the seat from going any further back.  Does this sound at all right?

I'm sure I could figure it out eventually through trial and error, but I'd like to know if I'm on the right track, or if I should still look for that elusive "tab."

Thanks for any help you can offer.

Answer
Stephen,
 There is a cover on the rear runners that should be removed. The tab that must be held down is in the center mount.  A screw driver is pushed from the front direction and in between the rail on the seat and the mount which it slides on.

Rick