Hi guys.
Thanks for your help but I give up.
Went for the install & using my meter located a constant & switched fuse, great I thought but no ... nowhere to earth the dash cam to, not a single screw to earth in or around the fuse box area!.
I wanted to do this myself & learn something for a change but hey ho guess it's not to be ..auto electrician it is then. ☹️☹️