Easy to run it off the thermo switch on the bottom inlet.
You can rig up a simple switch to run the fans when you want it to aswell but I dont see the need. While moving at 60kph the fans are useless as the air coming through the grille is stronger then the air the fans can draw through.
If you plan to run an electric water pump then just wire them to a switch, this would allow you to keep coolant circulating with the fans running while the car is off. Maybe even get a few more hp with that setup. Good for track cars