How to change map device skin to purchased MTX?

Sorry if this is a basic question, but it's not really obvious to me. How do you change map device's appearance to purchased MTX?

I know for sure I have several but scrolling during edit doesn't seem to change it to the mtx's I bought. Only the big and small default one that exists.

Thanks in advance.

Search it on the panel with all decorations and just click it and drag on map deive in HO.

The hideout MTX can be a bit confusing because they don't get added to the MTX inventory, they are in your hideout decorations inventory, so you go into that like you are going to place an item down on the ground and look/search for it in there.