double checked on a few of my speakers with a few more plugs. They don't fit. :/
Although, I ordered 15 pairs... I'm not sure exactly what I was thinking.. heh.
As I could use 12 pairs connecting wire to my receiver, and the wall plates, and then use just bare wire for the connections to the speakers... I'm not sure how much its worth it to return 3 pairs of plugs for like $8... or just keep them for the hell of it...