I bought exactly what you are talking about (a colour surveillance camera) and installed it recently, wiring it directly to our TV screen (it doesn't have a monitor).
My first attempt at using it was a disaster because I just couldn't remember that what I saw was a reversal of what was happening (i.e. Left was Right!). I ended up reversing (albeit very slowly) directly onto the bow of the boat |I was trying to avoid......
It's all wired up for 12V with an accessory socket plug and I'll post it to you for £25 (Inc. P&P) if you want it! It's got full colour, night vision, sound and 18M of cable. I fixed it to a heavy block of wood and stood it in the rear window, the wires I just laid along the side of the galley passageway.