all of those housings and electronics you'd think would be built in to the craft, and therefore not calculated in the CARGO HOLD
the cargo hold is typically a dedicated space within the ship meant for only storage. On smaller ships, these are small arms cubbys and maybe a empty torpedo tube with a door on it.
Larger ships have cargo bays, large expansive rooms meant for storing the supplies said ship will need for a journey, or whatever cargo they're hauling..
Things like this are why it kinda bothers me we store crew in the cargo bay.... Crew goes in the crew cabins, not the cargo bays.
Thats just me though.
Any weapons you dont have equipped, certainly should be put in the cargo bay. Last I checked, we didnt strap spare cargo to the outside of our ships (that tends to cause problems with atmospheric re-entries and center of mass and whatnot)
[ sci·am·ach ]
/sīˈamək/
A simple, angry man casually working his way through life on a personal quest to acquire copious amounts of street cred.