I'm in the process of installing my new car radio because I had an old aftermaket JVC 1992-1993 model cd player and no labeling of the wires I'm lost. It has only 4 speaker wires: white, white+black, gray, gray+black. Can any body give me assistance as to what speakers they're for. I know typically which speakers they are typically for but I just want to be sure before I connect them wrong and blow my speakers.