Run wires from inside the car connected to a circuit that becomes live with the doors open, as shown here, CLICK. Then run the wire forward under the carpet and come up and over the sill where it is covered by the sill cap which has CROSSFIRE embossed on it. Run it along the side of the sill and put the wires through the gap at the forward edge of the rocker cover.
There may be better ways to run the wires upon more thought.
After all how hard could it be?