If you are handy, you can take a look at this pdf
https://docs.google.com/viewer?a=v&...zLXRlY2gtc3VwcG9ydHxneDo1Y2QzOWM4ODRhMmM3MGYx
On page 2-1 you can see the cable layout next to the motor including the socket for lights.
Gain access by first removing the plastic bash guard below the motor then loosening the 3 torque indicated bolts that hold the motor and remove the upper two. Then pivot the motor down on the 3rd loose bolt and all is revealed. Be careful not to over tighten the bolts when you replace them as the frame is aluminum and threaded (easy to strip).
At the top of the down tube, it is really simple to remove the plastic cable guide which then reveals a rectangular hole. An electrical cable can then be easily fed down to the motor area and a connection made to the lights connection. I think I read somewhere that the lights power is 6v. Someone will confirm no doubt.
You could then hook up a light you want, like the M99 pure (not cheap!!) or something similar.