The pins can be taken out of the plastic plug and then taped back to the other wires. I would get some old plugs to practice on. The pins slide in from the top, and are held in by a tab that sticks up on one side of the pin so they don't back out when you plug it in. If you can slide something thin llike a paper clip in from the open end and push the tab down and then pull the wire out. It helps to hold the terminal in a clamp of some kind. Then you can push the wire in while pressing the tab, Then pull the wire out easily. Otherwise it takes 3 hands. To put them back in you need to pull the tabs abck up a little so they hook into place. If you break one off you've ruined it.