Hey! Thanks for the input everyone. The measurements are a big help. The previous owner replaced the vinyl top. I felt around in these approximate locations, but couldn't find any remnants of holes. They must have filled them with bondo. This has the original green interior sail panels that are in pretty good condition. And, I'm afraid I'll damage them if I try to take them out.
I was on the fence about using double stick tape. I found some 3M Plastic Emblem & Trim Adhesive (PN036001) that I'm going to try. It's supposed to work with all sorts of materials, including vinyl, and metal.
Since these are die cast parts with a cavity on the backside, I filled them in with JB Weld, then filed and sanded the surface flat. This will provide a lot more contact area for the adhesive.
I'll let you know how it works, and try to post some photos. Again, I appreciate all the feedback.
Here is what I have