My boat was missing the nav light on top of the arch. I bought a new one and found out I have no power there. 1. where under the cockpit do these wires run to? I don't see any blown fuses on the buss bar. My buss bar is not labeled. Any idea which circuit on the bar handles the nav lights. 2. if I need to run new wire how do I get it up in the arch. I do not see any access from the starboard cockpit area. HELP!