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I use 3x5 or 4x6 note cards, or sheets of heavy paper, and push the screws through the paper. Have used this method for the last 50 years.
Note that there is no security in these wireless plugs - anyone could turn your wireless plugs on and off, so be sure there is nothing dangerous connected to them (coffee pot, heater, etc). But this would be more expensive and difficult with secure wireless.
I like that idea - good thinking!
Nice! I was just thinking that if you needed it covered, you could put a bucket over it, just need a few (movable) brackets at the bottom to hold it.