Can you identify these?

And, I did have the headliner out but helped with the replacement. The retainers for the bows are similar, but different - and they're all accounted-for and installed . . .

I'm still thinking these go in the rear quarter window area, but I've looked it over and don't see any obvious place for this type of retainer. Maybe this weekend, when I'm installing the new panels I'll figure it out.

Thanks again.