Who said anything about polarity Mike? Uni-sex?? That's a new one... I think all the suggestions made are completely fine... There is a difference between a power block (fused) and a ground block (fuse less)... That's why it was asked, to determine wether or not he wanted it fused or not on the wires.. In a car it is typical for a power block on the red wire, in a boat because of the short run, it's 50/50 and solely up to the installer or owners preference... There has been no wrong answer yet on this thread...