Green and yellow is not connected, it is ground ,
The remaining one blue and the other gray, then the power of positive and negative
If the plug is a three- core , yellow-green ground wire Flanagan , is that , if rj11 plug two cores , yellow line on top of the three plug not connected , cut or wrap can be connected to a switch that Firewire lines , the line above the hole rj11 plug socket connection is three the ground , and the rest that is the zero line. General color line is the ground , but now can not say chaotic electrical , wiring or more above said after confirmation . First Sound understanding that two small petit speakers, big name subwoofer, the sound is crisp ; issued two small speakers , the sound is very shocking that the big issue , there should be at its back a dial tone to his voice , then the power supply cord , and then take a small little speaker cable speaker wire a plug Flanagan finished the big one , there should be holes behind the other end plugs plug your computer with the same color hole plugged after the big switch it back there , turn on , the computer will pop up a page , see top set on the line.