The patent shows an external module labelled "Memory Card".No discs doesn't necessarily mean cartridges. It could be download only.
It also shows how it contains 2 components, one of which is put into memory and the other stored and accessed using the "Identification Information Obtaining Unit".
Oh and lets not forget that there is a module labelled "Card Slot".
The only thing I don't understand about this is why would the game apparatus PSU be connected to the controller connection unit as such a big thing.
The only way it could make sense to me is if they were using wireless charging.
The rumor that the NX handheld would be doughnut shaped makes me think that maybe they will put a dildo charging unit on the console to allow it to charge multiple handhelds at the same time and this diagram furthers that idea.