That fat black is shield. You can identify the wires with this image if you have a multimeter. I seem to have used brown and grey for the power and your colors seems to be green and white. Don't know which would be the ground though. From those markings on could determine that white could be Common/Clock, green Data, red Ground and yellow Voltage or something.
Main Computer: Intel i5, MSI H55M-ED55, 12 Gigabytes of DDR3, 3 Terabytes of HDD, GTX295 and Benq 27"