A lot of people have asked about which fuses to connect to, and I haven't seen a concise answer.
I just installed a Rove R2-4D Dual Pro in my Air. I used the hardwire kit. I ran the cord around the edge of the ceiling parts, 3/4 of the way around the passenger seat to the A pillar, halfway down the A pillar, then crossed to the back of that pillar and under the door seal rubber where two pieces of liner come together (this is below the curtain airbag). A couple of inches of cable are visible when the door is open as I cross the end of the dash to duck below the glove box. I used the fuse panel under the glove box (remove the cover with four T20 screws). I connected the always on power to MB12 "Interior Radar and Intrusion Detection Sensor", and the accessory power to MB10 "Trunk 12V Outlet". The hard part was finding a ground screw--all of the obvious ones were screwed into plastic. I finally used one of the ones that seals the electronics compartment next to the fuse panel. One of my early attempts at grounding caused the dashcam to be unreliable at turning on.
I haven't installed the rear camera yet. I want to run just the front for a little while and make sure it is working well. Testing the parking mode was tricky, as there is no simple way to turn off a Lucid. I ended up standing about 20 feet behind the car where I could see the dashcam through the rear window, and could see the screen change when it went into parking sentry mode, about 2 minutes after the car locked itself.