pioneer navi unit on honda pilot?

Got a guy who wants a Pioneer Navi Unit installed on his '07 Honda Pilot. I never installed one before, but it shouldnt be too hard. Theres just 3 wires on the Pioneer unit that needs to be connected that im concerned with.

Car Speed Signal Input (Where do I find this?)

Parking Brake (Do I actually connect to the parking brake wire? Or a wire that says when the gear selector is in park?)

Reverse Gear Signal (Where do I tap into? Reverse lights.....gear selector?)

Thanks.

reverse gear is only needed if doing back up camera,

parking brake is at the parking brake.. find wire that is ground with parking brake on and no continuity at rest or something that you can at least use a relay to make it work.

Speed signal you'll need to look up a factory wiring diagram could be in a few different places no reall way to guess on it

Sorry. Forgot to say ill be installing a back up camera too.