The black box quick connect was made only to put together small ground wires fast on the assembly line. It is not easy to take apart. It is possible to pry some of the plastic apart to spray cleaner in around the connections. I had to use some zip ties to hold it together. That is why I went to the nice new battery lugs with extra holes for the small wires. It made a much nicer looking installation. I got the battery terminal lugs from eBay. Some people replace the back box connector with individual ring type connectors on each small wire and then bolt onto a regular battery lug.