How do you wire your speakers?

That depends. If they're computer speakers and all your wires are headphone-jack style, then all you do is run the headphone wire from your speakers and plug it into your computer speaker input on the sound card, or a headphone jack. If they're not computer speakers and you want to wire component speakers through your computer, you'll need a receiver to power them, speaker wire to go from your speakers to the receiver, and a cable to go from your receiver "input jack" to your computer. That cable should have a red and white RCA on one end, and a headpone jack on the other.