Enclosure from Adafruit

I picked up one of these enclosures from Adafruit

Does anyone know what the small square parts are for? They look like they might be part of a push button or something like that, if so what board might you use?

Thanks
John

I believe those are little rubber feet.

They are buttons, fit in the square holes in one of the dark inserts

Is there a shield or something to mount the tactile switches to?

They are molded with the outer case wayneft...

John