Let's start on the outside of the house. The plumbing input is a standard connector that you can hook a garden hose up to (electrical 30AMP connector is on the left)
Once you get on the other side of the wall, here is a short video of what it looks like on the inside:
A few things have changed since I made that video. The walls are all closed in now, so it weird to watch this since I've come a long way since then. Also, I have added a pressure pump right after the water enters the house. Post pump the water branches off to the heater and cold goes to the rest of the house. The reason I put the pump in was because the pressure was at the bottom end of the spectrum and was in need of a bit of a boost. Works great now. I'll see if I can dig up a picture of the pump somewhere..