These usually come with screws: https://www.amazon.com/Outlet-Mountable-Spaced-Commercial-Switch/dp/B08B3J6JM5/ref=sr_1_3?keywords=metal+power+strip&qid=1685805061&sr=8-3

I have most of mine vertical on racks but no reason why they couldn't be placed upside down and are quite sturdy.

I use something close to this: https://www.amazon.com/Wireless-Fosmon-Electrical-Weatherproof-Included/dp/B072F9DGRL/ref=sr_1_4?keywords=wireless+power+outlet&qid=1685805131&sr=8-4 for remote power on/off. Push the button from my desk and I can power cycle whatever I want like a garage door opener and in fact the remote fob is a Skylink.