Welcome to the Club Michael!
I keep my XK on a CTEK battery conditioner when it is not used for a week or two.
This keeps the battery fully charged, but will not overcharge, so can be left on indefinitely. I leave mine on charge for a couple of months at a time when we are away in New Zealand.
I have a comfort lead permanently attached to the battery, with a connector in the tailgate, and run the mains lead through the corner of the tailgate, which can easily be closed over it without causing any damage. I have been doing that for the last six years without any problem at all.
Hope this helps!