I looked under the passenger seat connections because I have the airbag light on and Passenger Airbag off light on. I noticed one wire connector wasn't connected to anything at all? does anyone know if its supposed to be connected to something and what its for? anything help would be great.

It thought it had fewer wires but I think that's the heated seat connector. What components don't work?

You have some serious wiring ****ery going on under that seat with those crimp on connectors, is that even a G35 seat?

You can unbolt the seat and tip it backwards into the rear seat to get a better look at what's going on, SRS harnesses will be YELLOW in color, unplug your battery because you could definitely have some loose wires under there.