They sure ran that neutral close to the top of the main and its terminals, didn't they? Could they have pulled it any tighter? Or, maybe it has been 'pulled tighter' (i.e., no cable clamp, someone pulls the other end of the cable, cable pulls tight like shown). It is 'unusual' to see a cable stripped back that far into a fitting as the cable clamp would be clamping the insulation instead of the outer sheath - also a no-no.