The solar and power wiring enter the Jeep from the rear edge of the driver's freedom panel, near the outside edge.  We will leave a coil of wiring attached to the rear seat driver's side grab handle on the B pillar. We provide 13ft of wire, which is sufficient to either run to the Jeep battery or to any location inside the Jeep cabin.  The wire to the solar panels is a heavier gauge than the load wiring, so they are easy to tell apart. We test the panels for voltage output before installation and also at the end of the wire harness in the cabin after installation. In addition, we provide voltage to the wire harness to verify that the light and USB charger are functioning correctly.