This is a remix of the Home Assistant Yellow enclosure with the mounting flanges. You can use some #6 wood screws to mount it to a desk, table, or something flat and easily screwed into. The source is at https://cad.onshape.com/documents/e630640b4a7c08845b3722c9/w/a982665c74eac10109734bab/e/a648279f02bb606988153834?renderMode=0&uiState=6407c6a3268707116a5df3c1
The author remixed this model.