I bought these LED strips to put in the front and back. I had it installed in my old car but didnt wire it myself. I want it to turn on with my headlights. Any ideas how to wire them and hook it up? What I have to do/get to make this possible. I tested them with a 9volt battery, they all working and pretty bright.

LED B3 Blue 2X 12" Interior Strip Footwell Lights Under Dash Bulb SMD Exterior O | eBay

 

Run the posative wire to the back of the radio or under the steering wheel and splice it to one of the wires that powers the interior lights and Then run the negative to the chassis or any piece if metal for that manner.