I’ve been following a project making CG models of the sets, and the guy figured out what the device used in the aft compartment of the shuttlecraft was. I don’t want to just repost his photos, but I wanted to post the link and the information for anyone curious. He doesn’t know if this is old info, and I’ve never heard it before either.
It’s the most recent post at the bottom, at this time.
The object is a Brown chart recorder.