Another screw thread size for foam panel

[eenaoo]

I'm spening the Easter doing the foam job on the lower manual. However there seems to be done some work on the organ before so there are screws missing.
Do anyone know the thread size for these, red circle in the picture? I only got access to mm screws so it would be nice no the size since they have to be ordered. The picture is of the lid above where all the tiny tone wires goes, and there the foam where.

Arne

[eenaoo]

Never mind. I manage to figure it out. It is the same size as for a PC case. So 6-32 UNC