These instructions came with my case (I'm a first-time PC builder), but I don't understand it. What do the numbers on the right mean?... Thanks for any help!
If you look at the USB headder on the mobo your going to see a Key IE there will be one pin missing on it. That is your #4 position for the second set of USB ports.
So if you start at the other side its like this
.....
....
12345
1234
"Don't open that! It's an alien planet! Is there air? You don't know!"