Reverse and Park wires from new radio - 2007

I'm installing a new radio and cannot figure out where to connect the reverse and park wires from the radio. Any body out there know where is best to connect them?? Help will definitely be appreciated.

 

The make and model of your new radio would definitely be appreciated.

 

Park may go to ground. (by-pass radio features manufacturer programed not to be available while in motion)
Reverse:

IH1_6 at Junction Block is near engine computer.
ID2_1 is behind Driver's kick panel (kinda far for a radio wire tap)

 

Thank you, I appreciate the totally helpful info. About a dozen years ago, when I first joined this site, the service manual and wiring diagram were available here but somehow I’ve lost them. Very comprehensive, thanks again.