Inside of the MO-10

As you can see, the fixture is accessed through the top like the OV-12. If you look at the black PC wire, you'll see the insulation has peeled off. Once I get the chance to clean this light out, I will check the condition of the rest of the wiring. I may end up having to rewire the light. From just looking at the pic, it seems like I will end up rewiring the fixture. Westinghouse ballasts have integral leads unlike GE though, so I will have to splice the wires about an inch or two from the ballast and just glob some liquid electrical tape over the remaining inch or so of old wire. Love the red varnish on the ballast! It looks like I will have to install new threaded rods in this light since the existing ones' threads are rotted away. It's a miracle they were able to get it off the pole!