I leave the extra black wire alone where it is in the new connector. It dead ends there. Can't cause a issue later.
I put the orange wires together outside/beside the original harness connector. Orange is for the little light at column shift indicator. Floor shift builds wouldn't have it. Factory could have gave it a separate connector. Unused port in the switch connector was a penny saved.
Anyway... black to orange will blow a fuse. Connect orange to orange.
And by the way, the black wires are different gauge/size. Another member had connected his large gauge in harness side to that extra smaller gauge on new switch side. It didn't work.