The problem is you're trying to access looms that are installed at the factory prior to the headlining being installed. So access is going to be difficult without at least partially dropping the headlining, but of course will vary from vehicle to vehicle. I've also done a lot of electrical work on various vehicles- professionally and at home (from converting carby cars to full EFI systems, alarms, dashcams, head unit upgrades etc.) Yes, all hard wired dual channel dash cams will have the same problem if the cable supplied isn't long enough to route via the floor. The wire becoming tangled in the curtain airbag is my concern. That could result in it not deploying correctly.