66 dart inner door emblems How to attach?

On my 66 dart 270, the doors have been filled and painted. There is no "Dart 270" emblems on the doors. I found these, but I am not sure how they are supposed to attach. What kind of holes do I need to drill into my doors? Anyone have a picture? i have thoughts of perhaps dremeling the brackets off, making it flat, and just JB welding the entire emblem to the door??
emblem.jpeg