This is a universal wiring kit so it's not a custom fit to your 57 which I suspect your already know.
Are you using the 1969-74 GM column as noted in the instructions?
If not then it looks like you have additional wiring to do.
If you have added the wiring, would you please provide a diagram of this wiring?
Note in the instruction:
This kit was designed to function with a factory GM style
switch and column plug. It plugs into the 3-7/8” plug found
on GM columns from 1969-1974. It is found on a majority
of after market columns including Speedway’s Tilt Columns
such as p/n 910-32972
If you are using a later 1975 and on column we have
included a connector to convert over to the required style.
The columns use the same pin out locations making the
swap easy; please follow the wiring table below to install the
adapter plug on a column.
