My 2007 Winnebago View originally came with a curtain that hung across the back edge of the cab over bed. There were two snap fasteners on each side, not on the bed, but on the columns/trim just behind the cab doors. The curtain was missing. I got a curtain panel that was the exact correct height and width when hung SIDEWAYS. This was a fairly flimsy material but the right color and did let light thru. I took some inch wide woven strap material and sewed patches at the locations where the snaps went, and added one in the middle. I then used a very pointed soldering iron to burn a hole in the right place, took it to work and used the DOT fastener tool to crimp the fastener in place. Back home, I pulled it snug and marked and burned the next hole and back at work the next day, set the next fastener. Did this for all four plus the one I added in the middle that was attached to the bottom of the flip up bunk. If you accidentally raised it with the fastener snapped it just popped loose. Since the curtains came in a pack of two (from the Ollies outlet store) I did both of them to have a spare.
First pic is outside in full daylight with all shades pulled down. In the third shot you can just make out the silver DOT fasteners, two in each upper outer corners. Middle one was on the bottom of the bed screwed into the steel frame.
It did wonders for keeping the air conditioning in the cab while traveling and I had no other way to get any privacy as it did not have a windshield/cab door covers. Last pic, the curtain is snapped and I just threw it up on the bunk bed. Most of the time I unsnapped the right side and middle and left the left side snapped.
Charles