First time posting with an issue.

I have a 2004 G35 Sedan. I just finished replacing the rear rotors, pads, calipers, etc. When I got in the car to start it no lights came on, and my ignition did nothing. I had let my 2 year old play around inside while I was working on it.

I've researched everywhere. I thought it might be the NATS system, but that wouldn't explain everything being shut down. The red security light isn't even doing anything.

Is there a particular fuse or something that could be the problem?

HELP!