As these said.
Not sure what engine you have but providing you have the airbox on your wing on the left side in looking at the engine bay, whip the cover off, take off the pipe to make it easier then take off the two rubber rings holding the lower box in, take it out and somewhere will be a yellow plug. Disconnect it.
It just keeps a low volt feed to the headlights when the sidelights are on. It isn't needed or required and you won't miss anything by taking it out.