This mount was designed for Tripp Lite surge protectors specifically (this is the one I bought: https://a.co/d/9lJTw99 ).
You will need to stop the print in the middle to put in 12x2.7 mm magnets. I put two in each hole and found when mounted vertically it held decently well. Tree supports are advised for the top part and I blocked support on the magnet hole. I printed this in PETG and it withstood me trying to break the pins off.
The author marked this model as their own original creation.