I finally figured out how to and got around to sewing my new front and rear curtains. There are two separate tubes across the top for the curtain rod. There is a dowel in the inside on the bottom edge. They are lined on the back with a heavy dark green fleece (this prevents light
coming in or out, and also does not wick any moisture that gets on the windows). When I want them up, I just roll them and tie on the curtain rod.