I've heard people just use a relay connection and wire it into constant and then trigger it from the headlight wire - Probably easier to get an auto electrician to do this for you then get him to run it into an existing loom or get a new loom etc.
i was told dis way connect a wire from da op ups to earth body of viechle den send a positive wire to da lights power cable den send a negative wire to da lights off cable on da instrument cluster or da lindictor stall