Here's a link to the bracket I bought:
https://www.ecstuning.com/b-genuine-...t/64551739627/. As you can see, there are brass inserts of some type that I am not sure are compatible with the bolts.
I will confirm the thread/insert situation on my current bracket tomorrow, but I recall I was seeing some discrepancies when I first dealt with this issue.
I will see if I can find those hex head inserts at Harbor Freight tomorrow. As far as 6mm hex tools go, I have an allen wrench, a ball head long bit, and an impact wrench bit (which just might be long enough?). I will report back tomorrow or Friday. Maybe I should write a DIY since it took me 2 months to do this?