For all wiring, this little schematic is the basis for all wiring. I highly recommend using a second battery for almost all your wiring needs. Of course if you’re running a high end stereo, then more batteries would be needed. I also recommend installing LED lighting. Check our associates at EZACDC and the Boat Wiring Store. PontoonStuff also has these little micro LED’s that are very affordable and I love using them. Another item that’s very handy for dual battery setups (or more) is the VSR system if your outboard has at least a 16amp charging system. Click on the image below to get a bigger image.