Ah, I understand, it's not the interface, but a scene.
In the UI folder, leave the UIGameRoot.(UIGameRoot) file; it contains information about which recruitment scenes will be in the city.
Leave the Maps folder; it contains recruitment scenes and battle scenes.
In the MapObject folder, leave the files with "AdvMapTownShared" in the name, e.g., ...(AdvMapTownShared).xdb; these contain information about which scenes will be in the city battle, but this doesn't apply to Orcs; their information is stored in the Stronghold1.(AdvMapTownCombat) file.
Added 7 minutes later
Just make sure to check that everything is in order with the battle scenes, fortifications, and towers.