What you want to do is tap into the parking light wires. open up the panel uder the drivers side foot well and the wire is located in the upper left hand corner in a white plug. Tap the positive from the gauges into the park lights and the other to ground.
If you cant find it get a low current light tester or voltmeter and probe the wire and turn your parking lights on. It will show positive when you turn on the switch.
When you head lights are on so are your park lights so there is no need to tap the headlights.
Hope that helps.