There is a circular bracket that holds the switch to the column under the dash. There is another actuator bracket that mounts to the shifter shaft. They normally were used on Cameo's that have BU lights in the taillight assy. I have not seen a reproduction. I have one and can send you a picture, send me an email.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine