I had a short red LED auxiliary light from a previous bike lying around, so I added it to the bike to keep me safer.
To wire up the unit:
remove both panniers for better access
unscrew the 4 fender Alan bolts.
2 from under the back of the lower guard and 2 from under the guard
the rear guard will now drop free.
I drilled a centre hole for the wires and 2 mounting holes either side.
drilled 1 hole at the back of the guard to allow the connector to be stored in the tail of the guard.
RTV silicone applied at the back of the wires to prevent corrosion.
I connected an automotive male/female connector plug and spliced into the wires that are exposed from the Right rear brake globe.
It is much brighter than appears in photo, and can quickly be disconnected if needed.