35 window regulator stud

[bbrust]

I'm putting my windows in my 35 Fordor and was confused as to the location to install the window regulator stud. I ran a search and found a picture that showed exactly where its mounted (Below). The question I have is that the mounting hole on the repo glass channel is much smaller than the size of the repo regulator stud (78-702148-K). I can just enlarge the hole but I'm wondering why they are different. Bob