Thanks for your comment mate.
The only wires in that wall are the 240v wiring running through a pvc pipe to allow replacement.
My auto and marine electrician is drawing up a wiring plan ;-)
The level isn’t being used to check for level mate. It is only being used to ensure that it is running parallel with the floor
Good observation tho mate ;-)
The area on the bottom right where the diesel fuel filler and tank vent lines are will also house the sink drain hose and will be behind a steel door concealed by the fridge.