The previous homeowner seems to have turned a plug in light into a hard wired one, as pictured above. There was a bare copper wire originating from the box with a cap on it pushed way up and not connected. They also had a bare copper wire from the light fixture simply attached to the ground screw. And the neutral and hot wires were as shown. This light can be turned on/off from 2 switches in the home.
My question is... is it acceptable to follow their lead and connect my light fixture the same way. I have a light fixture that has 3 wires, L, N and unlabeled. Or do I have to fix the ground wire somehow.