I wanted to run the small wire through the hose between the car and trunk lid, but it looked way hard.
First I pulled by the top red arrow and created a gap where I could push the end if the wire up towards the glass. You need about 20 inches from the red arrow to the center of the glass where the rear camera will mount. Tuck the wire in where the green arrows are.
Then I stuck the camera on with the sticky tape, and plugged it in. Removed the extra slack and then snapped the black part back where the top red arrow is. I left a little extra wire between the black molding and the rubber below (yellow arrow).
Next was pulling the rubber up in the corner where the two pieces below come together (bottom red arrow). Pull the last 10 feet under the rubber and leave a little bit of extra (yellow arrow), and push back the rubber.
Using a plastic putty knife, I began tucking the wire between the two pieces (blue arrow) and pushing the wire down about 1.5 inches.
Sitting in the back seat, I began running the wire from the back to the front of the car. Tucking the wire in where the blue arrows are. Where the little window was, I just stuffed the wire between the head liner and the glass, you can not see it.
Next, I tucked the wire under the rubber molding on the read window (green arrows).
Then, used the putty knife to tuck the wire around the middle pillar. (blue arrows).
Now from the front seat, continue around the middle pillar (blue arrows).
Then tuck the wire under the front window rubber (green arrows)
Using the putty knife, tuck the wire around the path of the blue arrows, tucking under the front leading to the wind shield.
Continue tucking the wire along the path of the blue arrows, towards the mirror. There was extra wire so I stuffed the extra along the part near the sun visor.
Use the putty knife to spread a little gap on the plastic mirror cover and have about 2 inches of wire hanging out.
I taped into the unused 12V power connector under the microphone cover, but this connector is not there on newer cars.
Good luck with your install. I was not that bad.