Stuck like this

1993 Classic 240 wagon. Can’t seem to fold the 3rd row seats away for storage. I just had them in use for a couple hours so my daughter could ride back there for a change. Now, they are totally locked in place and I can’t find a latch or a release lever so I can put them away.

 

I seem to remember a silver metal latch in the middle of the seat - can you see it if you lift the seat back?