Hello, I recently bought a Logitech Z506 sound system and i am trying to hook it up to my computer, it has a 6 CH and Stereo. The 6 ch has a light green audio in and then it has and black and yellow one and the stereo has red and white. It also has Front right, front left, back right, and back left and center. The only problem with this is that my computer does not have all of these hookups, i only have a Green, Blue, and pink in the back of my computer. How do i hook this up? I only really want the subwoofer hooked up but thats the problem, i just have to hook up the speakers into the subwoofer if i want them. I have no clue how to hook this up, any help will be appreciated.