FCS Fin Plug Installation: Before or After Glassing?

I am working on my first board and am a bit confused about fin plugs. I am glassing with S cloth and Epoxy and chose to go with FCS plugs. Should the plugs be epoxied in before I glass, or do I glass first and then drill out holes for the plugs. I know this is probably a dumb question, but I'm just tryin to get a bit of experience so any advice is much apreciated.

Thanks-

The FCS ''plugs'' are installed after lam and hotcoat. FCS Fusion is a pre-glass route, install in the lam. Two different systems/installs from the same company.