electric choke wiring

just finishing up my stuff a 340 in a 66 barracuda project and have all new wiring harnesses and need to feed a wire to the carb. carb is a holley demon 700 with electric choke. My question is where should I feed power from to choke without having to splice my new wiring harnesses. if I have to splice where should I get it from so I don't have to cut twice trying to figure it out.