Windshield sealing? lock strip

Ooookay, I got the front and rear weatherstripping for my 70 Swinger, as well as lock strips for each end, but how do these strips go on? The guy that did the glass install wasn't sure what to do with them and now I still have leaks when it rains...grr...makes me feel like either 1) I got jipped, but he's always done great work in the past or 2) I need to figure out how to get these locking strips in there.

He did say that when I put the trim back on I will need to add a little sealant under where the trim goes, but I have never heard of this being done and don't want to do it unless given a go ahead. I'm really hoping these lock strips are what I'm missing....help...please? :prayer: