I agree, use a terminal block for both positive and negative sides. And make certain that the terminal block (usually the positive side) is fused or circuit breakered as well. It honestly doesn't take that much extra time to arrange things in a nice neat orderly fashion when doing things the correct way. Label each fuse or wire so you will be able to tell which wire you are looking for in the future. Because you will absolutely forget, guaranteed. When having to track down a electrical problem, it will certainly pay for itself in time saved to have everything in a nice orderly fashion then... And I am also planning to make a clear concise schematic diagram to go along with the wiring setup in my boat as well... A little time spent now saves so much time when things are not going so well later... JMHO!