...
Since this is usually a non-selectable static placeable (if that checkbox is ticked the placeable acts as part of the terrain when placed). The portrait doesn't matter but you can change it to a stutue if you so wished.
Place it in the area:
You can save and quickly press F9 to load in and make sure it doesn't crash in-game and looks fine:
Summary
Congratulations on adding your first bit of custom content! There will be a Hackpack (HAK file) creation tutorial written in the future and linked here.
...