I have taken time to label every wire running to the house batteries. Tape will do it but do yourself a favor and package of colored zip ties. I have a package that has 5 colors in the package. They are the small tiny zip ties so they look decent. I took my owners manual and made a list of the colors and put description of each color and where they go on the battery. Some of the little wires I put 3 to 4 together and zip tied them together to where they would always go to the correct place. this has helped me big time over the years to taking my batteries out and cleaning them and the area they rest in. I have my batteries out right now for testing and cleaning but once I get them back in I can take a photo an post it so it makes more sense!! Hope this helps someone . Dad
