Street Demon electric choke wiring choice?

Hey guys, I've got a few seconds right now because our twins are asleep and I've been researching this and was curious on some opinions of what source people hook their electronic choke on their carbs to. I know it says it should be something that only gets power when the ignition is on "run", but I'm curious as to what you guys have done and how much wiring is needed? Do you run it through the firewall into something inside the cab or do you splice into a wire in the engine harness? Any help would be appreciated, haven't been able to touch the car in the 4 months since our twins were born and I'm going crazy and plan on getting wrenching again soon. Thanks