71 Demon Vinyl Top Trim Replacement

I'm curious to know if someone can tell me how to replace the chrome trim piece for the vinyl top that goes between the side window to the back window. I have it off and there are three plastic clips that go over the studs on the car but there is another one that is different that is threaded and goes in a hole to the inside and held in place by a nut. This is the part that I'm having trouble with. I've seen articles about trim pieces that have this clip and you need to unscrew it from the inside which normally wouldn't be a problem since the article is using a car that the trim piece is mounted low enough to where you can access the nut from the trunk or behind the back side panel. The Demon unfortunately has the trim piece mounted higher up so that the nut is under the headliner. Any ideas on what to do? Was hoping not to have to remove the headliner to get to it. Possibly is there a way to just pull the headliner back just in that area to get to the nut? if so please give me an idea on how to do it. Thanks

Hello, is it possible to use a well nut ? You might be able to screw the well nut onto the screw and push it into the hole if you can find the right size. BTW: What color is your Demon ? https://www.napaonline.com/en/p/BK_6652836?r-src=SSE:PDP&ppid=BK_6655053&ir=3&tps=6