I have been trying to figure out what is the black thing hanging on the wall ,you can be sure that it is there for a reason,something that prominent would be planned. Also what the piece of furniture is below it?It looks like it could be a bench or bench and table together.Victorian furniture is very dark so I stained it burnt umber.I think that is a wooden pail hanging from the rafter and there also seems to be a rolled up black curtain to be able to close off this section.Probably for privacy or to keep out drafts and dust.
I would say that passengers would use the door at the end of the car to gain access to this area.