Need some help! I have a pal 321 Amp tube type and on the back it has a small stud with nuts on it. It has the word Ground under it. My ? is dose this need a wire on it and ground'ed to the wall socket or raido or something else. My thought was it is for wall outlets that dose not have the ground plug like the old house's had. Heres the thing if it needs to be grounded I would like to know to what or not at all. Thanks God Bless.