Hello. I have an old old old receiver from years ago (Radio Shack Realistic brand) and it's been sitting in the basement for years. A local non profit senior center is looking for audio equipment. I want to donate my receiver to them. I'm not sure if this old receiver will work with their speakers. Someone already gave them a pair of speakers. The speakers only accept RCA type cable connector. Unfortunately, my old receiver's speaker outlets do not accept RCA type plug. I remember just put the wire directly into the opening. They look like this: Do you think I can find speaker cable that will work with my old receiver? Thanks for your help. :)