I was told that this box has something to do with extra speakers with the radio in my 1970 'Cuda. I am not sure what it does as my radio has been inoperable for years. If anybody knows what it is used for, please let me know. If it is for radio speakers, I have no need for it. It has 3 pairs of wires on the harness (olive/red, green/black, blue with and without white stripe). The label is 80% gone and now shows only a MOPAR pentastar "2884" and the letters "CLETR".