Never thought of them as C's before, but I can see why you would.
It's funny how Trek details change purpose over the decades. The "impulse deflection crystal" at the top of the intermix shaft in The Motion Picture becomes the "symmetrical warp field governor" and nothing to do with the impulse drive in ENT, a sensor array at the front of the dome in The Motion Picture becomes the bridge window in ST'09, and those three circles often considered a saucer deflector in TOS technical publications are the conference room windows according to Discovery season 2.
It's funny how Trek details change purpose over the decades. The "impulse deflection crystal" at the top of the intermix shaft in The Motion Picture becomes the "symmetrical warp field governor" and nothing to do with the impulse drive in ENT, a sensor array at the front of the dome in The Motion Picture becomes the bridge window in ST'09, and those three circles often considered a saucer deflector in TOS technical publications are the conference room windows according to Discovery season 2.