Installing a dual snorkle ..

I have a '75 duster..

Today i took the engine bonnet outside and pulled off the insulation and hit it with a degreaser so I can paint it this week.

I am installing a duel snorkel hood scoop and had thought there would be dimples where the holes should be drilled...but not a single one..

Is there some sort of template that I can get so I don't totally fu*k up the hood ?

Appreciate the help.

Thanks
Grassy