How to add amp to stereo w/navigation need help to find what colors which wires are which

Hey looking at my stock Navigation radio need a diagram for the radio wire and remote wire to tap in. To install an amp. If there is a diagram that shows which wire is which such as speaker wire, and where to connect remote wire to amp. Thank you in advance.

 

This should be the wiring for a 5th gen. It took me about 3 minutes to find on google. Connect your remote wire to any 12v switched source.

 

You can simply use the red ignition power to turn the amp on. All it means is that it will always be on when the ignition is on. However there are plug and play interfaces out there for adding an amp.

Here's one example: https://catalog.pac-audio.com/catalog/amppro-amplifier-interfaces/ap4-ty13-r2