if they are the same as a 93 then they screw in from the back side. I think if you pop out the speaker and reach up in there you will feal one screw. Unscrew it and then you can pull the vent out towards you. And if you break one I have a set for sale

if they are the same and I believe they are.
P.S. I took them out after I pulled the dash off. But I do not put them back together just part them out.