I did plan going strait over my headlined with the 0906 but it turned out that's pretty much blocked ( looked with M8ts flexible bore scope )
Down low are troublesome unless DC and 0906 share same cable, but i do plan on routing the DC along the side of the roof, and i can do so no problem as i have no airbags there.
So i will do.
Mid windscreen to top A pillar driver side ( left )
Top A pillar behind A pillar plastic trim to door rubber seal, along top of door to b pillar down a little still behind rubber seal.
Cross from front of B pillar to back of it below the seatbelt where the hard plastic are, then in under the door rubber and up and over back door to C pillar.
C pillar i will have to follow down a little still under the rubber seal, and then proceed back into the boot of my car and in under plastic trim on C pillar to the upper left corner of my hatch, and there i will dive in under headliner and head for the middle where rear camera will be located.
This should be the short route you can follow even with curtain airbags in your car.
I dident even have a gap above the headliner along the side of the roof, that would be the ideal place, but its like my headliner breach the whole with of my car in several places ( or at least 2 places )