Fender emblem holes

The hole is definitely welded and looks to be about 1/2 inch across and very lumpy so I wouldn't be able to drill it from that side. It's going to be easier from the outside.

I've seen the ones pentastar parts have but I've already got these ones so I wanna go with these.

I guess I'll have to wing it. I thought there might be a template, I know the Chevy guys have them.