This ice wall cleans up the area behind the Hoth target and also tones down the flasher that is annoying for shorter players.
To install, you remove the trim plastic under the front of the ATAT, then remove the nut holding the left ball guide down and lift that up so you can slide the ice wall bracket in. When you screw the trim plastic back on, the bottom side of the screws embed in the wall bracket, holding it in place.