I mounted mine (Cee Baileys) in the stock GSA spot, and they fit for all adjustments on the GIVI screen, as well as leaving the right spot for the Powerlet plugs.
Alass, after nearly 2K miles, a sidedraft (probably 50 mph) took one of my winglets off at speed, 85mph, and I lost it. Duel lock is good, but not perfect.
I am ordering another set, and will still use duel lock, but I will also be finding a way to keep them on with a very small clamp, or a teather.
I love them, and the 1000 mire ride to and from the RA reminded me why.
Oh, and I use them with the stock screen in summer, GIVI in winter.