MIDYEAR 1967 TURN SIGNAL SWITCH REPLACEMENT
Here you see the basket with the switch mount in it separated from the steering shaft.
Pull the basket mounting collar off the column, lift  the switch mount out of the basket, then remove the ribbon cable of the old switch from the basket. Insert the new switch and cable, then reassemble all the parts in the exact reverse order of their removal. Be sure to refer to your diagram and/or digital photos to get the order and orientation correct.
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