LoL this is not a floppy device. This is just a small box. You just put the hand in it and pull it. The box opens. You can put small things like mobile etc in it. It is just a console.
I think you are mixing it with the Electronic Toll Tax Collection Card Reader? Arent you? My vitz have that too but it is under the dash, on the left bottom of steering. This floppy device kind of thing is used for electronic tool collection. You simply put the electronic card in it. When you pass through a toll plaza it automatically deducts money from you card. Check this link:
Japan devises way to lessen driving toll - News - Stripes
Here in Pakistan it is of no use.
Best of luck,