Need Wiring Advice for New Stereo

I'm ready to install a new Pioneer stereo in my '14 Taco and need some help. I need to tap into a line for reverse and a line for park. Can someone with a schematic tell me where these are available behind the dashboard? Thanks a bunch.
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The one for park you can run to ground so the truck doesn't have to be in park to play video. Didn't hook up reverse. Just hit the button when I need it.

 

Thanks, watchdog. I looked in the Audio section of this forum and found where to connect the reverse line. Knowing I can just ground the park line makes life easier, too.

 

It was just easier for me too rather chasing down wires.