If you want the cable directionality to be BNC to SPDIF, just add "BNC TO SPDIF" to the cable build notes field. 

This is a speciality cable terminated with a S/PDIF (RCA) connector on one end and a Word Clock (BNC) connector on the other. 

GN = Geistnote. GN-WE-RR-BB is a custom cable assembled by an Aerospace Defense Contractor using Canare dies, Canare tools, and AS9100 Rev C/ISO 2001 quality management practices. 

The Apogee Wyde Eye cable, BNC Canare, and RCA/SPDIF connectors on the GN-WE-RR-BB are the same as Apogee uses on their WE-BB and WE-RR series cables.