Navigation system wiring help needed

[Homestarmy]

Good Evening,

I just came into possession of an '05 Vibe and decided to replace the factory stereo with a JVC KW-NT300 DVD/Navigation unit. Wiring the harness was no problem, However, the unit needs to be attached to the car's speed signal lead, reverse gear signal lead, and parking brake lead. The problem is I have no idea where these particular wires are located or what color they are. Can anyone give me a hand with this? Surfing the net has been fruitless.

Thanks