Easiest to just file off part of the plastic alignment pegs. That will hold the controls tightly and still let you adjust things where you want them after the bars are mounted.
I had the same problem, so I backed it out enough to really hear it at 25-30 mph, then stopped and tightened about an eighth of a turn. After about 6 adjustments I think i'm about there. I also could't hear it at idle. Ride and tighten til it gets quiet.
Street Naked works the best, I also added European made Yamaha adjustable risers set all the way back and still kept stock wires, brake line, and clutch cable in place. Much more comfortable.
The outlet on the left side of the dash comes standard. The right side one is optional for around 39 dollars. The wiring harness is ready to take the outlet plug.