It’s mentioned in the books, kopeng. I think it comes up in some of the repair scenes, but there’s such a jargon dump in many of them that it might slip by. Naomi is caressing some of it at one point, like she’s petting a cat. Which is not far off from how she sees the Roci.
I can think of two in the show, but one is right before Holden needs to tell Nagata something important, and the other is in the middle of a brain dump at Tycho station when the Roci is being diagnosed for repairs.
