I think I have the same or similar kind of curtain "track" that held the privacy curtains for the bunk beds in my trailer. Kinda hard to tell from photos if they exactly the same or not. I removed the bunks, but still wanted to hang a curtain from the ceiling in order to partition what is now my storage area, from the living quarters of the trailer.
This is gonna be difficult to describe but . . . there is a clear plastic strip about 3/8 or 1/2 inch wide that is sewn to the curtain edge. That plastic strip has attached to it small plastic nubs, or pieces that are shaped to fit into the groove. You fit the plastic into the groove starting at one end - you'll have to remove the screw at one end of the track and slide them on. The strip is concealed and makes for a very clean hanging installation. I simply removed the strip from the old curtain, and had it sewn to the curtain I wanted to use, but if I wanted/needed more of it, I'd call my trailer manufacturer. So maybe contact Winne. and speak to the parts people. You can see the plastic strip sewn on with black thread, with the plastic nubs attached to it sliding in the curtain track in the pics below.
Linda