There are 8 crates that he moves to various places in the 2 holds. The crates con red to me and have no name, however, you can give them junk and they will take it.
Have tried the usual rogue skills on them with no positive results. Will get someone with kick to come in and try kicking them to see what happenes.
One more thing, at about 5 am game time the boxes all despawn back to the middle hold to be kicked around again the next day.