Yep, judging from the picture above posted by @Zebras, it appears that the grey panel swivels on the case pin and can be pried up to view the model and serial numbers.
But I am still curious to see the battery! If you ever take the case off again, would you please show us a picture of the battery? We have seen the “3D CT-XRay-scan” image from @sterei in this thread, Wow!
It would be cool to see a real-life image for comparison to the scanned image.