If you carefully cut the casing back a bit sideways, you should find the end of a braided wire. This braided wire is the connection between the coils fine secondary windings and the terminal for the plug wire and is only about an inch or so long. If you can find the end of it, you should be able to solder the terminal back on to it using rosin core solder. A clear, non metallic epoxy can then be used to fill in any divots left from exploring for the braided wire.