So, using the CWMoss sold correct battery and ground cables, they both do connect enough to work. The positive had no problems at all. But the negative doesn't sit on the terminal fully. That being said, even without the cover the cable doesn't sit on the terminal fully as well.
Here's the cables loosely attached
And here's the positive ground that won't fully go on even without the cover. I'd need a hammer to hammer it down.
Next up... I've sanded the entire cover. Need to glue the three pieces together, finish sanding as a completed cover assembly, then I can paint it! The base tray is printing right now... 2 of the 3 pieces are already finished on that. Side walls are still being worked on for the star texture.