sorry but I think you have 2 entirely different pieces of equipment confused...The neutral safety switches have been available since the late 50's they make it so automatic transmission equiped cars will only start when the gear selector/shifter is only in Park or Neutral... Hence it will not start in Reverse, Drive, 2nd or 1st... this was mandated as a safety feature by NHTSA (National Hiway Traffic Safety Association) to prevent a vehicle from starting and then immediately starting moving and running over people or objects...in the 80s some vehicles with floor shift automatics had a shifter lock override which made it so the shifter could be moved into to neutral in case of emergency without the key in the on position... this button is rectangular an found at the base of the shifter and is usually clearly labeled as suchlook closely it should be labeled...although someone could have removed the label... (label and factory decal removal often happen in my area where non english reading/speaking hispanics remove these to clean up the appearance of their cars & trucks)Most Floor shift automatics in the 80s had a shifter lock that if the ignition key wasn't turned the floor shifter would not be allowed to shift out of Park.... The Button in question allows this to happen... I recently repaired a floor shift 84 Buick Skylark with this issue of a broken piece in the console making it so the key tumbler wouldn't turn..Walt