We attach the pin to a key ring.
Pin on the front,
Velcro tape on the back.
So that the whole story doesn't flutter around in the cockpit and scratch the good piece, a Velcro point (hook) is included, which can be stuck near the ignition lock and on which the key fob is fixed. Insert the key beforehand to check where the point has to be glued makes sense.
The whole thing should last about seven years. Less for gross motor skills. Longer for care fetishists.