Back seat in Camry Wagon won't fold down. How do I get to the latch to repair? on 1998 Toyota Camry

Release button on top of seat back next to headrest -button missing. Used to be able to poke something down to release, now can't feel the release at all. How do I get to the catch inside the seat back to repair it? Can it be repaired? Or do I need to replace the whole seat back-if so, how is it attached & how can I remove it? Thanks

Asked by for the 1998 Toyota Camry