The SW-Motech brackets for carrying your water bottle and extra fuel is a great piece of kit, because there is only a small bracket permanently installed on your pannier, when you dont want/need to carry the additional weight.
They are not really made for the Givi Trekker panniers, but can be fitted with the help of a few extra bolts and spacers.
I’m mostly riding solo, so I prefer to have the brackets installed on the front side of the panniers for the best weight distribution. But the Givi panniers are the same for the left and right side, so if I need to carry a passenger, I can just swap the panniers to the opposite side – and then the brackets and the canisters are on the rear side, and then there is room for the passengers legs 🙂