JRC JMR-611 Instruction Manual page 176

Insert a card into processor unit
Procedures 1
Upper stage : card slot 1
Lower stage : card slot 2
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.
Backside of the processor unit
2
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
1
Card slot 1 eject button
Card slot 2 eject button