Do you mean you aren't sure how to attach the plastic at the ends?? I buried mine on three sides and framed out a door at the other. Attached the plastic to the door frame and supporting structure with thin strips of wood screwed down thru the plastic. I did split up some 1 inch black plastic water pipe sections (approx 3 in long or so), down the middle, and I pry those open and clamp them over hoops in various places to help gather up the "slack" in the plastic. Hope this helps!