1965 Valiant - Operating lever for backup light switch

BobW said
How about using a rivnut/nutsert in the shaft? A lenght of all-thread, jam nut & some locktite.

I cant say what would work best. I dont know if there will be a full round hole or u shape hole. I only know its a thin wall tubing and there isn't a lot of clearance between inside of tubing and the steering shaft.