Two questions!

1st: There is a hole behind the dash and I don't know what it is for.
In the picture below there are two large holes, one has the remains of a grommet and I believe it is for the fresh air and heat control cables. What is the other hole for?

2nd: It appears the body shop that painted my car filled in the holes in the windshield frame that hold the clips for the trim. Since the car was painted before I owned it I don't know if they were filled on purpose or out of ignorance. I want to use the metal trim so I need the clips. Thoughts?

Thanks
Jim

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Top hole is for water lines for windshield washer. Holes for windshield clips might be tricky. Get someone with the windshield out to measure the holes for you.

The same hole is used for windshield wiper wiring connections on a 914-6.