How To Wire Up a New Marine Radio

Well it must be "how to" season as I'm starting to hear from many of our readers and they have a broad range of questions from the complex, to the seemingly simple. A few day's ago a fellow named Ed sent us a query that seems pretty simple. Here it is: “hi Ed- i have to add lights and a radio to my boat. i have the switch and fuse box but i dont know about the neg and the ground wire connection.”