The tent is just the tent to sit over top of the hole in your ceiling. You’d just push the cover board up into the tent space then open the tent. My hatch has a tunnel built around it to retain several inches of loose fill insulation on the attic floor, and the tent sort of wraps around that tunnel/chimney. Not installed to manufacturer’s instructions. Between the tunnel & tent, there’s enough space to push the cover up and twist it to remove, then I lean a regular ladder against the tunnel to climb up & push the tent out of the way. Then just set it back over the opening on my way back down. Really just want something to make a second air chamber in that tunnel between the hot attic air and the fiberboard cosmetic cover.

You could probably get the same effect building a little foam-board roof over the opening, especially if your house doesn’t have the insulation-tunnel. It’s really that I found insulation bonded to the cover board made it too thick to twist out of the opening.

I found that foam insulation on the back side interfered with opening the cover board. You might have a look for little tents to go over the opening on the attic side. eg: https://www.walmart.com/ip/IBEEDOW/15403958129