Why does this always have to be so frickin' hard? FYI - I am in Canada so it is possible that Canadian vehicles are a bit different. I have a brand new P85D and I went to install a child seat in the rear passenger side seat. I used the tethers in the seat "crack" (near the seat belt anchor) and the top strap. According to the picture on page 25 of the Tesla Model S manual (V5.9) the top tethers appear to be in the middle of the seat. That is not the case on my vehicle - they are at the bottom and you have to fish around to find the anchor point. The point that I have attached it to is actual a bit left of the center of the seat (ie towards the center of the car) - at least from my perspective in the back of the vehicle. Is this the right spot? There also seems to be another metal piece of some sort more towards the center but I couldn't get the latch onto this piece The manual also says to run the tether strap over the headrest and that it will deform. If I have this on for a year or more is this going to permanently deform the headrest?