When I interpreted just what I saw on screen of the TMP refit with a blank slate, I thought the conduit running through main engineering was feeding power to the rest of the ship from the nacelles (i.e. from the engines). I assumed that the main reaction was actually occurring in the nacelles. To me, this idea is incredibly simple and elegant. If I understand Maurice's idea, what I just said actually takes that idea one step further.
However simple and elegant you may think it is, it's completely backasswards wrong, and how you came to that conclusion is mystifying. I thought it was pretty bloody clear that the power was being generated in the big glowy tube and channeled TO the nacelles.
Point to anything on screen in TMP or TWOK asserting that that is the way it works, and I'll agree I overlooked something.