Been a long time since I used one of these, and it was probably not exactly the same, but I will tell you what I remember. Keep in mind ours was on a hard sided pop up.
We had Velcro around the awning and the room attached to that. Poles in the corners from the awning to the ground or maintain room shape, as for springs, etc. no clue ours were like tent poles. Small pieces should fill in between rv and ground to seal that space off from those hungry skeeters sneaking in that way. Snaps down the side of the camper to hold it there. We had tent stakes to hold everything down and in place while in use.
Hope this helps.
Mark and Cecelia still doing that "W" thing