I've never heard of anyone telling their insurance about a hardwired dash cam. Best bet, really, is to use a multimeter. Traditionally, you'd have either ignition live, engine live or permanent. As things are different in this case, I would use a combination of the owners manual and a multimeter - you're looking for something like the rear wiper, etc. From what I can see, F20, F25, F38 ,F39, F66 and F67 should be contenders. F28 is the only one you should not touch. In my Octavia I used the empty Blind Spot Assist slot, as my car doesn't have it. If you have such a blank slot, use that - search a recent thread on dash cam fuse directions, by the way.