Since you are crossing STNG with SW, why not give it "X wing" Nacelles. In other words, you would have 4 nacelles sprouting off in 4 directions.
I found a site that gives some pictures of what you are doing perhaps one of them can give you more ideas:
http://www.shipschematics.net/cgi-bin/startrek/federation.cgi?Carrier
I think the Akira class starship was built like a carrier. It had more than your average number of shuttle bays.
Another idea, instead of attaching the two as you have, what about building it like a huge Oberth class ship, where the cargo portion is slung under the saucer