Someone asked how a new harness would attach to a 2000 series Bendix mag. As far as I've ever seen, they always come with a new back plate and it simply attaches to the mag with 4 screws. These screws only get torqued to 35 inch lbs, so you need a very low scale torque wrench. Over torqueing can lead to case warping and was the subject of an AD on them years ago. You'll need to tell them what plugs you have (5/8 or 3/4 barrel) when you order your harness. Also,you want to make sure when you are installing the harness, that all of the wire ends or insulators go inside the holes in the distributors on the back of the mag. It's easy to miss one or two of the holes and it won't run very well that way. (Don't ask me how I know).
Hope this helps some. John Sickafoose EAA Tech Counselor Naples, Fl