You start with a plan, otherwise you end up with a bunch of poorly routed wires and a system that is more trouble than it's worth. It seems that everyone that wants to wire/rewire a boat wants to go "switch happy". Understand that devices that have their own power switch do not need another separate switch. Radios, GPS, fish finders are just a couple examples. What you need to do is go to a dealer and look at how a tiller steered boat is configured for gauges and other electrics. They almost always have a small panel on the port side of the boat on the rear bench. Thats the way you face when operating a tiller steered boat. The battery can be anywhere. You run two 10 gauge wires (black-ground, and red-+12v) to the fuse panel through a circuit breaker or fuse at the battery. Everything else branches off the fuse panel to the accessories. Keeping the battery charged is why you are installing the charging kit. Keep in mind, just because you have charging capability does not mean the small alternator on this engine is capabable of fully charging a deeply discharged battery in a 10 minute run back to the dock. You would need a solar panel nearly the size of your boat to be used as a "charger". Small solar panels are simply battery maintainers. Go to the top of this forum and look at the Generic Boat Wiring Diagram. Eliminate what you don't need and use what you need. How you run the wires is up to you. The charging wires (hot and ground) from the engine need to connect directly to the battery. more