Sorry for the lack of details, I'll try again.
The area you are seeing in the 2nd picture is after the microwave was removed. The Romex is run to a plug for the microwave.
The original vent hood had a black wire and a white wire. A purple wire and a white wire coming in from the left side was crimped together with the black wire. A purple wire and a white wire coming in from the right side was crimped together with the white wire. The controls for the vent hood were on the hood, fan and light.
Thanks for the replies. I don't do anything to the camper I'm not 100% sure about until I check with this forum!