Do a quick web search for "driving light wiring diagram" and you'll see plenty of options. You do NOT want to go straight from the switch to power as mentioned--make sure your circuit includes a proper relay or you will keep frying switches. You will also see options for wiring into your headlights, if you so choose.
I found The Haynes Manual comes in handy for wiring things like this. Does anyone know where to find vintage KC lights for a first gen? The new stuff doesn't stands out too much on a well patina first gen.