Is it the tool that uses the RJ Jack? Looks like the old telephone jack, but with more wires/connection points. Get a RJ Crimper RJ Plugs, cut the one old plug off and crimp a new plug on. When you do this, there is a #1 on the RJ, make sure the RJ #1 is in the same color wire on both ends. Repeat with other end. I just threw all my old manuals away several months ago, couldn’t get anyone local to take them.