I think what confused everyone is you called it a switch, and not a starter button. Big difference, and goes down a different path. I would try to contact the previous owner and ask why the switch is there. If no luck, remove it . there is no need for it if your switch on the column is working properly.
Second nite... Why would you not want the neutral safety switch on the clutch pedal? Sounds crazy to me. That's an accident waiting to happen. I have seen it happen on others cars, and it was never a planned event. Start in gear and go through a garage, or over a person. 100% dangerous, and preventable.
1969 x-77 Z/28 orange/ white stripes, named by my daughter "Clementine ", M-22 close ratio, 4:10 12 bolt, CE 302. Hugger orange with white stripes. White standard interior. Restoration complete May 2018