I have just bought a 1975 Venture 25 that has lights, a place for a battery and a home made pannel with switches and fuses. The problem is that it is old, rusty and probably in need of replacement. I am not even sure how to get things to work. Is there a good book on how to wire for lights, battery needs, radios and things like that? Also, how does the motor charge the battery, how do I hook the motor to the battery, etc. I am not new to sailing, however, I am new to a boat with a 12 volt system. Help! Thanks