My problem begins where this Guide ends 😀. When it comes to the relay or control box, it just reads: "Please contact your local Side-Power

distributor for service support.".

Side-Power could not help because Amel does not use Side-Power joystick or panel control, and the wiring is different. It is my understanding at the moment that, if you follow the connections recommended by them, you may fry the Black Control Box. 

I have some more research to do when I get back to the boat. If/when I find the answer, I will post it here.