Looks like a 110v fixture/feed. Test that w a meter. I’d put a plastic junction box on it and go from there. If ALL of the succeeding conduit can be seen/accessed you can use plastic/metal conduit w romex in it switch leg/feed respectively. Depending on local code. Some won’t allow romex and demand non-cable wire. If you end up needing to bury it code probably calls for metal/armored conduit.