I need to attach the number plate on the front of my Mazda but I can't just put screws through as the holes are rectangle (see picture). I think it will need something in between but don't know the name of that accessory.
EDIT: In fact, somebody stole my plate (on-street parking). For that I don't bother much because it was the old plate. I bought the car second-hand and applied for the new plate, which just arrived. This is the plate before being stolen. It doesn't look like it needs something complicated/big/etc.