"Xenomorph Bust Wall Mount" Mount

PLEASE NOTE: THIS IS ONLY FOR THE MOUNTING PIECE, THIS IS NOT THE XENOMORPH BUST ITSELF I printed the pictured Xenomorph Bust Wall Mount at 300%, but could not find any mounting solutions to the strange cavity provided at the back to mount it. I modeled my own in Blender. This is currently scaled to fit the 300% version of this model, so please adjust the scale based on the size you printed it at. If you do shrink it down, it might be a good idea to go into Blender with the provided .blend file and open the screw hole up some. At its current size, it has a 4mm wide screw hole and a 11mm washer inset. See the rest of my Xenomorph prints:https://makerworld.com/en/collections/9299922-xenomorphs