Where would you put one of these stickers?

[1971 300 Alvah]

My friend who was neighbors with the lady I bought my car from just had these stickers made of the original owner! The one and only Alvah, namesake for the car. She needs to come along for the ride with me! Wondering where to stick her?

 

[3175375]

Passenger and drivers rear side windows.

 

[commando1]

My friend who was neighbors with the lady I bought my car from just had these stickers made of the original owner!

Why?