How is the horn button/cap attached to the springy round thing on the wheel?

Do the spring steel edges of the round thing go on the inside of the cap or on the outside?

Also, does the nut holding everything on require a washer? Mine did not have one when I removed it.
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Last edited by Otto Skorzeny; 06/04/2022 3:49 PM.
1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)