Two pegs at the top of the ramp drop into the steel eyelets (shown in Chicken Door photo) so the ramp can be switched from door to door in a trice. The plywood pieces keep the chickens from sneaking beneath the coop. In the future I might build some sort of easily detachable skirt. The two tall panels are necessary because otherwise from the top of the ramp the chickens can easily fly over the poultry fencing. Didn’t anticipate that one. The yellow and orange thing is just a plastic guard for a cable supporting a nearby electric pole.