[ Madoka doesn't have to be told twice. She's already moving - leading the way. Kyoko must know the carriage exists for her to be talking about it, but Madoka's pretty sure she will probably have the train layout memorized more after all these months than the other girl. ]

Don't worry, it should probably still be a while until we have to fight.. So you'll have time to figure that out. The missions usually don't start until a few days after new people show up on the platform.