I have to ask did you see any of his previous work prior to hire? did you ask for references or pictures of his previous restores? If not unfortunately you have some of the responsibility here.
Iām in agreement with you that the work in the photos you posted is very sloppy or just laziness. Cleaning a harness and all hardware is a basic fundamental step in a playfield swap. The damage shown is inexcusable and should be corrected or compensated.