I put mine on the inside of the faring to the right of the headlight. use the sticky pad and press on firmly.
Did the install last night, but rather than mount the ballast on the inside of the fairing, I carefully tie-wrapped it to a large wire harness cluster behind the fairing. I didn't want any wiring attached to the fairing should the need arise that I have to remove the fairing and worry about disconnecting wires; could get a bit clumsy.
Hopefully the ballast will be safe and the wiring harness will not have any problems with the ballast hanging on to it. If need be, I can re-locate it.
The lights are working but haven't taken the bike for a ride at this time to see how the HID is aimed or how bright it is on the rode.
But the LED high beam appears to be useless from what I could see from within my garage last night. The HID overwhelmed the LED in the garage so I'll know more when the get the bike out for a ride.