Now, I saw the Interfacing Diagram, but it is a little bit confusing? Do I have to use the Cigarette plug only? I have not received the LI yet, but I will have one soon, within the week and I just want to be ready to install it the way I want it. If anyone has any pictures of them doing this, it will be much help. Sorry for not being able to understand the diagram...im challenged in that area. lol. Thanks in advance!