As you know, the 47-54 Factory Assembly Manual is actually for 1954/55st Chevrolet trucks.

And, as you know, the steering wheel and the steering column changed in 1954.

And, as you probably know, the 47-53 Shop Manual does not show what is under the steering wheel (at the "joint between the steering column and the steering wheel).

You are asking the right question. Maybe someone will post a photograph?