Help with roof bows

[66STNG]

Hi guys,
Looking at installing the roof liner in a 66 coupe. Problem is there are 2 holes next to each other that the bows go into. I have trawled the net with no luck.
So do I use the top hole or the one slightly below.???

[Nuts]

First things first.... Make sure you put all your screws in for sunvisors, mirror and coat hangers etc to make it easy to find them later. When I do a headline install I use the higher holes. Others may use the lower. The front bow is tight against the roof even without any lining.

[66STNG]

Thanks nuts, I willl use the tops holes then. I wonder why there are 2 different holes? Maybe the lower ones are for midgets?

[Nuts]

I've read somewhere that is was for adjustment for best fit.

[66STNG]

I think I'll stick with the midget theory.