From the perspective of what you want to do, just get the cable and you're done. The tape is 4Gbit, the QLE2462CK is also 4Gbit. You direct-attach the cable. No such thing as terminators.
Obviously make sure that the HBA has drivers for your O/S. One of the big advantages of FC is cable distance, so get one that is plenty long. Don't worry about a non IBM FC adapter. As long as the software works with the tape drive, and drivers exist for your O/S, then you will be fine.