I don't know the exact answer for your boat, but commonly in the industry (assuming there's no visible screws on the top or bottom backside)...
-- Friction fitted with plastic Christmas trees (gently pry while looking at the back side to verify)
-- Look between the pleat for screws. Sometimes you have feel for the screw head and look for a very small slit to get at the screw
-- It is "slid" down into position - so removing would be lifting it straight up - kinda "knocking" it up.