Does anyone have the wiring diagram from the radio plug to the harness on the factory wiring would like to confirm wiring as the Eonon harness to pnp plug appears to be good. I did notice one wiring is label amp-c anyone know what that wire is?

That should be an amplifier trigger wire. Also called a remote turn on wire.

Reason why I ask is when comparing it to the picture of the plug it shows it as 12v Ant Out going to pnp harness and Eonon wiring states amp-c.

Ant Out is for powered antennas. When you switch your head unit to "radio" or "FM" it feeds that wire +12v for the antenna. Think old cars with retractable antennas. It used to be very easy to switch the amp con with the ant out on Kenwood head units. People used to always ask why their amps would only turn on when listening to the radio. ;)