if its the same as a 96-98, and i assume it is, then the bottom seat has a single bolt that can be removed from between the back rest and the bottom seat
its a pain to get to, but its only one bolt, folding down the seats part way allows more room to work with
its dead center and a 10mm or so sized bolt if i remember correctly

i havent ever tried the side bolsters, but try taking out the carpet in the trunk and take a look for some bolts from behind