Installing After-market Rear View Camera Issue

Aha moment finally arrived. Wisdom received = Polarity is NOT reversed. RV lights are wired correctly. The color coding, however, is different than what I was used to: RVs white / red goes to ground; black / green goes to power. Camera powers right up. Four bars of signal strength received in the cab monitor. Works great. Still enrolled in The School of Hard Knocks where there are no graduates and no degrees because the learning never ends.