WAIT! Of COURSE! That's IT!
I was trying to have engine gizmos and doohickeys coming out the ass-end of the thing, like its the point of a rocket or something.
The TOP is the exercise in pure design, and everything engine-wise and stuff has to be slung underneath it, not behind it. Everything needs to fit within the insignia shape. Thus, when it slips into its socket, it will fit.