The repair was basically the removal of four screws holding the mullion assembly hinges (2) from the door, unplug the electrical connection, plug the new electrical connection in, feed the connection into the hole in the door and then replacing the screws through the hinges into the door.

I was so pleased I got the correct part on the first try!
I know manufacturers use plastic because it's cheap and lightweight, but these parts break SO EASILY and it's ridiculous. At any rate, I used a Phillips head screwdriver to take off the old part- top and bottom. Then I needed another set of hands (or use the painter's tape) to hold it in place while I screwed in the new part, top and bottom. (2 screws each). Other than needing someone to help hold it in place while I did the first 2 screws, it was simple and one person can do it --You use the masking tape to hold it for the first two top screws if you have no help. Thank you