I just installed a similar dead pedal today. I’ll admit this was one of the most frustrating installations for such a simple part. I used a zip tie to hold the bracket in place. The 3m double side tape didn’t help. The zip tie kept it in place nice and tight. Unfortunately I dropped 2 nuts and a washer behind the kick panel trying to get the back stud tightened, never to be seen again. Hopefully they don’t rattle around. Lock nuts would have been a better, easier option.