It depends on how large they are and whether they go through the cabinet. If they are small enough you can just put screws in them if bigger wood dowels. Are you sure they aren't ports though?
Holes in back panel of speakers
Hi, I'm new to Audiogon and in need of advice. I bought a pair of used bookshelf speakers which have a pair of small holes in the back panel that I suspect the previous owner did in order to attach mounting brackets. My question is, whether these holes affect the sound quality, and if so whats a good way to plug them? Thanks in advance.