Oh, the bracket will will work jus fine. It's the way they tell you to attach it and the hardware they sent. I mean, it may be possible that they sent the wrong bolt, but, I've never really seen a place that stores new nuts on the bolts as a pair. They picked a M10-1.5 nut and bolt to send.
It's possible that eariler bikes (<2016) actually used a M10-1.5 there, and they are unaware.
Anyway, me being the dumb mechanical engineer that I am, I'll be designing a new bracket, and have my nephew, a genius fabracator make a few up. (I just don't like the idea that the thing is held by only one bolt, and the fact that you have to ruin the original bolt hole)
It's also temping to eventually use a Ti bolts there...lol (every little gram counts...), Maybe even make the bracket out of Ti.
