Canvas Side Curtain Frame

[Jim Price]

The screen I obtained from Brian Asbury is a bit different from the ones I've seen in this thread. It has a different sized set of "windows' that the one Maurice has but the same as Chuck's. However, There are three"cinch" type fasteners that attach the bottom of the curtain to the door. Please see the pictures below.

Another conundrum: When I got my truck there were ring snaps along the top of the door frame. My body guy dutifully replaced them when replacing the wood framing. What was their purpose? Is there a third "flap" that snaps on there? See the picture.

Regards,
Jim