Here's a site which shows what to do. http://www.justanswer.com/jeep/3wiuy...-cherokee.html
The 80B6F0A7 drawing on that site is looking at the passenger-side rear of the seat, looking forward. (It looks like the front part of the seat/head rest.)
The place where Mark is showing the small flat blade being inserted, on my 2000 Grand Cherokee Laredo is a lower piece/section of the "ring". I can press it inward with a finger if I also press down on the padding/fabric.
Maybe because mine is a Laredo there is also a rather large wide knob on the lower side of the rear part of the head rest. It has triangle on it "pointing" up. If I move it up the top of the head rest will tip forward allowing the head rest to remain on the seat back and clear the tipped forward seat portion so the seat back lays flat.