The white wire is routed high up on the kick panel and through a small grommet down into space behind the switch. You may be able to look at the other side and figure out how to run it through.
The other solution, which I used to run speaker wires and power lock wires, was this. Remove the plastic kick panel on that side. Pick a point on the metal (behind the plastic) that is about even with the switch, and in from the edge about an inch or two. Drill a 1/4" hole (with a grommet) through that area and snake a wire from there to the back of the switch. The hole and wiring will be hidden once you reinstall the kick panel.
Bruce