Yes you have to install them. I got mine from GoWesty. It's been a lifesaver
up on Lake Superior during bug season. You just sit inside and laugh at the
mosquitoes.(the black flies are another story alltogether)
Call GoWesty, they may sellyou the snaps and instructions separately. Good
luck.

Roger VanTill
89 Westy "The Moose Lounge"
86 Syncro "HUMMVW"
92 Escort "The Turd" (sorry,it runs)