I have recently bought the Logitech X-530 5.1 surround system ( http://www.newegg.com/Product/Product.asp?Item=N82E16836121126 ) And the three plugs on the logitech black,green and orange dont match my computers input, green, pink, and blue. Obviously green matches and works( I get front speakers/subwoofer) but where do the black and orange plugs go?