Cows will tear up anything they can get to.
Does the black Romex looking wire go to a pressure switch or float switch?
I would get some pvc conduit and needed fittings and bury the wires first from your power pole to your control box. Then I'd make an enclosure so the cows can't get to your well head and control box.
TAMU Wildlife and Fisheries Sciences
Boat racing is like a beautiful woman.......expensive, high maintenance, but well worth the fun!