Bolts/screws for interior lights

Hi everybody,
On the 1972 Buick Riviera, does anybody know what bolts/screws to get for attaching the interior lights to the underside of the dashboard? These are the interior lights that are on the extreme left and right underside of the dashboard. 1 is just above the park brake pedal and the other is on the opposite side of the car.

Both units on my car have different screws and I don't think either of them are correct. Here is a picture:

Interior light holder bolts/screws by gnatsum posted Jul 18, 2019 at 12:36 AM

 

I believe it’s the one on left with loose washer which makes sense. They would dig in less. Look for original marks.

 

Thanks for the info. Where would be the best place to source a replacement?

 

Go on line and check out www.amkpriducts.com they probably have exact. I think they have $35 minimum. Easy to do with all they have.

 

Well blow me down. Never mind. I do believe those you have are correct. Bother left and right are different. Passenger side is an assembly so it has loose washer. This is 71 GS diagram. I bet your car the same

 

Oh wow, weird! Thanks so much for checking on that and providing the info!

 

NP