Re: 23' inboard Seacraft SF wiring
Sorry, not many boat specific wiring diagrams are available, but Silvertip has a couple of sticky notes which show you pretty much the wiring diagram for all boats.
Boat design is pretty similar when you get to the electrical side.
If you have any specific questions or need help reading the the diagrams, we can help.
Remember you always use a wire to return "Ground" to the battery negative terminal. You do not use the hull, like you use the car frame in a car.