Ah, I think this is one of those special engineering features, where the nuts that you need to access are hidden inside the tail section. I could be wrong, but I think to gain access to them, you need to drop the rear fender!
I paid Moto International to remove the license plate light extension on my Norge (and I removed the other extraneous rear end bits, reflectors, and brackets) apparently mandated by the U.S. and China (but no one else). To do this, they had to drop my rear fender.