The feet fit into the existing mounting point of the Samsung HW-Q995GC (and maybe other models?). You need the original screws of the wall mounting.
I reserved space under the feet for these rubber pads:
X-Protector Antirutsch Pads 8 Stück 100 mm
Infill: 10%, I've used PETG from material4print in white (but PLA also works of course).
The author marked this model as their own original creation.