Installed mine just a while ago and here are some additional pictures that may help with install.
In the first picture you see the flasher, white clip and the metal brace. 2 10mm bolts (red circles) removes the cross brace and makes it way easier to get to the flasher. Flasher is on the left side of the column.
In the 2nd picture you want to insert a long thin flat bladed screwdriver on the right side of the white clip (red line) between the clip and the dash brace. In the drawing in the 4th photo (I'm no artist) you will see that the clip has a horseshoe type U-shape to it that goes into the dash brace hole and that is in essence sort of a spring loaded type attachment. You want to try and push the horseshoe part towards the left as you twist the screwdriver counter clockwise to pop the clip out of the hole.
3rd picture is the flasher unit itself and how it is oriented under the dash. To remove the white clip from the original flasher you have to lift the beige tab from the firewall side of the flasher to slide the clip out.
Now, the bottom picture is of the main wiring harness crossing under the steering mechanism and where the red line is is where I found my harness pressed hard against the bottom edge of the steering unit. The factory has installed a black sleeve over the blue wires because this harness is going to rub/vibrate (at least on my car) against the steering unit. I rolled up a small piece of bubble wrap and shoved it between the wires and the steering unit. While you're in there installing your Tap-Turn, check your harness. This, a few years down the road, could be a problem that will arise. I've seen a power steering hose eat its way into a wiring harness under the hood and that was a rubber hose, so I can't imagine that rubbing/vibrating against a metal edge won't do the same thing over time.