JRC JMA-610 Series Instruction Manual page 164

Insert a card into processor unit
Procedures 1
2
3
Eject a card from processor unit
Procedures 1
2
Remove the rubber packing located at the backside of the processing
unit cabinet, and expose the card slot.
Insert the card.
Insert the card until the card slot's eject button protrudes and complete
the installation of a card.
Push the eject button corresponding to the desired card slot.
remove a card from processor unit