I removed and labelled the stock Orion wiring harness this afternoon/evening.
The first image is the harness about halfway disconnected and the second is with it fully removed from the bike.
This last image you will see the old harness (TOP) and the NC250 harness (BOTTOM). As you can see we have some major differences right away. Length alone is going to be a problem. Also, this clearly came from a dirt bike not a dual sport. I can see a bit of wire work in my future as this project progresses.
We are going to set that aside for the time being and focus on the main elephant in the room. The engine. I am going to try to spend tomorrow moving the old engine out of the frame. More pictures and info to follow.