OK, I see. Don't think in your case you will use the black or the brown. Do you understand the ignition switch test? Do you have a multimeter? It's OK if you don't do the test. But I don't know which one is battery terminal on that switch.
Do not use any fork tongue terminals in your wiring. Only ring tongue. Cut off the red just in front of black splice and crimp on a ring tongue terminal with correct wire size barrel and correct hole size for terminal.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn