Wire type frome Home Depot good for 12-volt trig

I have a Krell Showcase Proc. Want to use the 12-volt trigger output. I bought the appropriate connectors from Radio Shack. They did not have the appropriate wire. I now need to know the appropriate wire to use. Home Depot would be the easiest as I need it ASAP. Also, I'd prefer it shielded.

Thanks,
Cap