So far, we haven't seen where the shuttles emerge from, right? The indoors animations suggest exit doors on the vertical walls, the MSD suggests a parking lot at the aft part of the saucer, and the exterior has hatch-like features on the aft quarters, at the termination points of the superstructure prongs. But a "support ship" might need lots of logistics openings, and the saucer bottom could feature shafts into which the shuttles can dive, subsequently choosing a vertical inner hatch for accessing a parking lot...
Timo Saloniemi