Graeme is correct, the padded area above the door is what is of interest. The one in the photo is a variation I have not seen before and is quite lovely. I can clearly see the screw attachment points (and assume they mate with the holes through the metal side curtain frame) but there is another variation I have seen, where the padding covers the complete side screen area and there are no obvious screws. How does it stay on? Maybe this variation is the factory version?
I want to try to figure out my approach to this and then will engage the professionals!!
And again, many thanks!!
Cheers,
Mark