It fastens behind the speedo. You release the speedo from the rear after removing the screen and the silver shield. Release the speedo slot the migsel mount behind it and tighten the speedo back into place and refit the other bits.
Takes about 10 minutes!
If you buy this months Motorcycle Sport & Liesure Migsels mount is featured on page 34 although it looks like its for another model but the text does not say whet its for........ fame at last Migsel