Most likely through the bearings. Since the column shaft is in constant contact with the bearings, which are in constant contact with the column body which happens to be bolted to the chassis, the center of the column has no problem finding a good ground.
Assuming you mean the steering column, it is what transmits the turning of the wheel in your hands to the steering mechanism which moves the wheels that are touching the ground.
It would naturally ground through the steering box, to the frame.
Dead short to ground in steering column
The flasher buitton is on the top center of the steering column behind the steering wheel
The steering column.The steering column.
Center of the instrument panel, right of steering column.
Usually, the bolt to remove the steering wheel from the column is located at the point where it attached to the column. If your steering wheel has a pressure switch for the city horn located in the center of the steering wheel, you'll have to remove it to access that bolt.
The steering wheel is mounted on the steering column.
The steering column is the part the steering wheel sits on.
Overload or short to ground
In the convienience center underneath the dash to the right of the steering column.
The steering column is the part the steering wheel is mounted on.