Re: AFT NACELLE (Spoilers)
Historically speaking and back in the old days (you know the 60's and 70's) the star ship nomenclature always referred to the main sections of the Enterprise as being Primary and Secondary Hull.
Referred to as such in episode dialogue, or in material not presented on-screen?
"It is my belief that nearly any invented quotation, played with
confidence, stands a good chance to deceive." — Mark Twain