Here's an overview of the installation of a Blackvue front & rear camera set on a 2019 I-Pace. Overall it is pretty straightforward, especially if you use the OBD-II Power Magic Pro connector like I did here. If you don't already have plastic car trim tools the Blackvue installation kit includes the one you see me using here.
In general, I never completely popped off any trim items, I just created enough of a gap to slip the wires behind. I ended up going with an installation that centers the lens on the front up high enough behind the mirror that it creates no additional line of sight interference for the driver. If you want to see the status lights you might want to mount it a little lower. Here's the view from the outside:
From the inside. Note that I have both the front and rear camera. One of the wires is for power, the other is for the rear camera.
I found there was enough room under the front edge of the mirror assembly trim to tuck in both wires, barely. I did have to pop up the trim just a tad, and could then just get it to attach back down. Be careful to avoid prying up where the ventilation slots are since I would imagine those are easy to break. Pry in the more solid part like I show in this photo. You could also possible route the wires around the back side of that plate if you'd rather.
From there it is easy just to tuck the wires in along the headliner. To get the wires behind the A pillar join, you don't need to pop the trim all of the way off; just enough to push the wires down into the gap. In the second photo here you can see the wire down in the gap. If it is pushed down far enough the trim will join back up again nicely with no gap.
Then you just pull back the rubbery strip between the A pillar and the door and run the power wire only all of the way down to the A pillar trim to the horizontal join in the plastic trim near the bottom of the dash. The wire to the rear camera stays near the top of the A pillar so it can be run towards the back later... running above the window along that same piece of rubber trim (see second post)
Now you pry out the lower plastic trim just enough to push the power wire behind it and up into the area below the dash. You'll still have plenty of wire left. Plug in the OBD-II dongle, then bundle up the extra wire and tuck the bundle up behind the dash in a manner that it won't drop down into your footwell. Your power is now plugged in! See the switches on the power dongle to the desired power levels and parking mode selection. I've been leaving mine with parking mode enabled and a 12.0 volt cutoff and have had no problems even with the car sitting for a few days. If you want to play it safer go for the 12.5 volt option.
Continued in next post...