I don't have Givi, but on my Happytrails bars, I took off the two bolts that go the the engine on the side, then loosened the front bolt enough to give me just that little bit of wiggle room to get the battery to slip past.
I could have probably left the engine bolts in and just loosened them all the way, but figured it was easier to just take them out and let it rotate around on the front one incase I needed the extra space.