This is a robbing screen for a National Bee Hive and it's pinned below the entrance block. This makes the entrance up above and to the sides of the actual entrance. It has a top slope to shed the rain towards the front of the robbing screen. The brackets are put in the small slots either side of the front vent , a small dab of super glue on the inside of bracket to secure brackets to screen. Edit it online https://www.tinkercad.com/things/lPmbZSSiSmv