I'm not sure there is a bracket, maybe you can mount something to one side of the handlebar. Check the RAM mount website, unsure if there's enough room for one. I use a RAM ball mount in the hole in the yoke... but that doesn't solve the power issue, and my 3 yo XT only works for about an hour with no power.. You should fine a spare power source under the front left fairing (which my Gen 2 doesn't have), and its easy to find a power cable online for that (Nippy Norman for example). Alternatively Evotech sell a cable you can attach to the battery terminals that provides a USB socket - this is likely what I need to do, but because the ball mount isn't a permanent fixture, I'm not sure if connecting the USB to the charging socket and exposing that to the elements is a great idea.
Interested to hear what you decide to do.