For the Top Box I used the Can-Am Sport Rack and with a home-made custom sized aluminum plate I bolted the Givi quick-release mount to the Sport Rack piece that is removable. Be sure to use nylock nuts and lots of thread-lock!
I also added a cover to the Top Box out of some aluminum diamond-plate I had. Used 1" spacers and rubber washers to keep the water out. Without the top cover the sun hitting the Top Box would really get the inside of the box hot! With the top cover it pretty well stays at ambient temperature, plus I can carry small, lightweight items on top, such as smelly gas cans and such.