Hello, I bought a 1995 Civic LX second-hand, so I'm not sure if this security light and rectangular "cut-out" is OEM or a post-purchase modification. Which is it?

I tried to have the rectangular thing pop out, as you can see in the 2nd pic. But I can't pull it out much further. The wire must be short.

Some questions:
1. How can I pull it much further, so that I can replace the light with a mini camera?
2. What would the electrical specs of the power be (volts, amps, etc?)
3. What dimensions (of the hole) am I working with (minimum or maximum dimensions)?