the wiring runs through the bulkhead on the left side of the vehicle, from the fuse/ecu boxes, there is a bit of room in the original gromits for new wires, but you'd then have to feed the wires through to the drivers side behind the dashboard and that could be a pain. Oftentimes these vehicles have preexisting wiring for options they weren't built with, such as heated seats etc, have a look behind the dashboard on the right hand side for original wiring there for the fog/spotlight switches, if that's there it shouldn't be too difficult to get an oe switch, and find the other end of the wiring to drive your new lights.