HELP: Where Would You Hide On A Freighter Ship?

Hey folks,

This always happens; get into a good groove, and then a little inconsistency pops up and completely derails the whole thing lol. If you wouldn't mind brainstorming a couple thoughts here, I'd appreciate it!

Short version is this: I've got a character who is a researcher that escaped from the facility where he was doing research related to The Big Bad Conspiracy. The way I have it written right now, he's hopped on a space freighter that regularly carries refugees and other trafficked people.

The thing is, I have no idea where someone would hide on such a ship! Could be one of many shipping containers latched onto the outside of the ship, I suppose, but most of those aren't going to be fitted with life support systems. Some of them might be, sure, so it's not out of the question, but it's not an ideal place; external scans are going to show the heat of people hiding. A freighter captain who engages in light people-smuggling isn't going to want that.

(it's also not ideal because for plot reasons I need this person to bump into someone else on the ship, which is going to be tough if he's locked up in a shipping container)

So I guess the question is this: If you were stowing away on a spaceship, or if you were smuggling people on your ship, where would you do it? For tech reference, think The Canterbury; a massive utilitarian solar-system ship with a torch engine generating thrust gravity.