The TC2030-ALT-NL cable is a special programming cable that has a TC2030 Tag-Connector at one end and a 10-pin 0.1″ pitch female IDC connector at the other. The 10-pin IDC can be plugged directly into some Altera USB Blasters and ByteBlasters.
Had to flash a pi hat for commercial demo. Had this within 1 day and it worked.
I'm glad your demo went well and that the Tag Connect cable saved the day!