Side Panels

[rtoomey641]

Hi I have a 97 Mariah Z 276 I want to remove interior to send to upholster to be refinished the seats are easy but the side panels have no visible attach points they are vinyl with a button in middle every foot or so the buttons unscrew I thought maybe a plastic insert like a car door but when I try to pry it apart seems like I will break fiberglass there is no access to behind panel its all sealed any ideas of how it would be attached?