What a lousy wiring diagram. I like the "hose cramp".
Anyway, I will add one more thing to look out for. The "hose cramp" is supposed to ground the switch to the steering column. When I installed the switch, I didn't want the clamp screwing up the paint on my freshly painted column, so I wrapped rubber around the column. This meant that the switch wasn't properly grounded and didn't work correctly. To fix this, I ran a separate ground to the switch by slipping a spade terminal under the clamp and running the wire down the column to a good ground.