Uss Stardis said:
My theory is, we're standing on top of the engineering section just behind the dorsal looking aft. The port and starboard nacelle attachment nodes are visible sticking out of the main section but without the pylons attached yet. The dome visible in the far middle is the shuttlecraft launch and recovery dome.
I don't think so, they seem to match the detail on the engines in the saucer shot.
Speaking of the saucer, it seems to have a lot of details from the refit.