Since I never took them out of the box, I never saw the instructions. I'm sure it works, too many people run them for them not to run.
You might have to mess with it. I mean, I just put MCE small saddlebag guard bars on, and that part was easy, but I wanted to put Motorcycle Larry's dropped passenger pegs on and they wouldn't tighten down enough due to the space between the MCE lower bracket (goes "around" the peg mount) and the peg mount.
I had to mess with it. (tm) Heh. Found a bag of .032 stainless washers, and sandwiched in enough on each side that with upgraded bolts and nuts (to allow more torque) I could tighten them down good and the pegs are now rock solid.
Now to your question about the threads in the frame that the bolt(s) screw into. Not much chance given the depth and pitch of the threads that you can hurt them if you don't exceed service manual spec torque. I would recommend whatever locktite product you use, you don't use orange permanent, but rather, a red surface-insensitive threadlocker. And even then, a lower strength red because the surface-insensitive designation means it holds better.
Frankly, I think you could just put anti-seize on the bolt, washer (add if none) and in the hole, and torque it to spec. But then if something happened KHI could tell you no warranty coverage.
So yes, the bolt is the issue. Torqued to spec the oem bolt will stretch. Do that twice, and it will get close to breaking point. Again, and it will either crack, snap, or strip. You can buy bolts that won't do that after a dozen remove and reinstall operations.
Living the Gypsy Life