It sounds like you're describing the original-equipment starter button for a hydramatic-equipped truck. It was on the left side of the steering column, facing downward toward the floorboard on the rolled-under part of the dash.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!