Right. Just come straight off the back of the ignition switch and to a dedicated relay. It is was me, and it will be in the near future, I would come off the ignition switch and go to a "positive buss" under the hood. That way, you can add other circuits later if need be. You'll want to fuse those circuits, though. If you add more in the future, you'll want to use a relay again, because that will take the full load off the ignition switch.
