screwing into fridge

I had a residential fridge installed in my previous coach (replaced Norcold with a Frigidaire 18.2 cu ft). The shop had done several RV fridge swaps. They put screws thru the feet on front of the fridge (where the rollers are) into the new floor they installed to hold the fridge. They also drilled through the side walls of the fridge box near the outer edge and ran those stainless screws into the wood trim they put around the outside. They put three screws on each side and used little white plugs to cover the screw holes.

The install looked very nice and the fridge did not move. They claimed they did this on all their residential fridge installs and never had a problem.