That is an external SCSI CDROM case.
You will need a SCSI to IDE/ATAPI bridge, such as the Acard AEC-7720U, to convert the internal SCSI connection to an IDE/ATAPI connection.
If your card reader is a passive IDE-CF adapter, then it will be non-hotswap, if the card reader is has active ATAPI circuitry, then it might be hotswap, depending on the make/model of card reader, memory card, SCSI-IDE bridge, and MPC.
You might also have to deal with splitting the internal power cable, if both the card reader and SCSI-IDE bridge need power, along with mounting the card reader within the case, maybe with a 3.5 inch chassis, along with a 3.5 inch to 5.25 inch adapter, maybe extending the internal SCSI and power cables if you want front panel access, etc.