[quote=@Bishop]
[@Lurking Shadow] You need the..uh.. eye of the captain to..[sub]open the safe...[/sub]
[/quote]

 the captain is (relatively) safely held within Traveler's carapace (think of it like a cage) which would include his eye as it is still attached to his head which is still attached to his body. So he did bring it to the safe to open it.