Door clips for glass whiskers?

[Jemo]

I'm sorry, I'm sure this has been asked but I did a search and couldn't find anything. I have a '59 and see slots in the door frame where the glass goes up and down that look like they could be for clips but I can't find these clips in the supplier catalogs.

I bought a 6 ft stick of the whisker and cut it to length. Just not sure how to install. I've heard of people drilling holes and using rivets but I just don't see enough room to try this.

Any help, please?