Did you just use the C word? Did you just build yourself a roadblock? Did you say that you **** have all 7 playing?
Okay, you're right. However you can use both the rear 3 jacks and front 2 jacks(assuming you have front panel audio jacks and get 7.1 audio.
The ones that are plugged into the board start with green then pink is in the middle and finally the black one is in the third(blue) connection. The order on my subwoofer is Green in the top, then black and finally pink. I then have many other connections but those come from the speakers.
As you connect them Realtek's sound manager should pop up and ask you which speaker you just plugged in. I think you know this but others may not. Within the Reakek Sound Manager you can RIGHT click those Speaker connection icons and retask them.