Ceiling LED lights

[flyguyhelo]

I just purchase a 2015 Bullet premier 22ft. in the kitchen it has circular light covers for the LED fixture. I was wondering how to remove it without breaking anything. I would like to remove the circular cap to access and check under the lights in one of them to possibly use it for a 12 volt source.
Secondly, is it possible to get from Keystone the electrical diagrams of the complete electrical system? Who do you ask or where to look?

Thanks,
Larry