06 head light sensor. Where is the sensor?

Just traded my CVPI for an 06 Fusion SEL v6. Love it. Anyway what I want to do is locate the sensor that measures the light that tell my headlight when to come on. I was thinking about covering it with a piece of electrical tape so when I turn the switch to the left to auto, the lights will stay on all the time. I don't want to modify any wiring so I can still turn the switch off or to the right for parking/manual. If I don't like it, I can always pull the tape. The switch also pulls out for the fog light. Thanks.