Unscrewing front screws on rolleiflex TLR

How do you unscrew those two front screws on the housing of the light meter on a Rolleiflex TLR camera that are on both sides of the light meter directly below the word Rolleiflex? They just have round heads with black color inside no screwdriver slots visible.

Pin holes on side of head. Use a sewing needle.

Thanks Dan, but there were no pin holes in my version of the screws, I saw a post somewhere that there are different version. I wrapped around them a piece of rubber heat shrink tubing and could unscrew with a small forceps.