Straight up to the on terminal of the ignition switch. It uses very little juice so it seemed logical to do that. The HEI coil because of the high amp startup draw (and the possibility it could damage the ignition switch even though the time period is short) and the two fans are run through Bosch style relays, though. Think I used 60 amp relays for the fans and I may have used a 30 amp for the HEI coil.
