Technical Echlin coil help

I picked up this old 6 volt echlin coil today and I’m wondering how I can hook up a plug wire to it. I’ve got my positive and negative posts and another spot labeled secondary. It works and runs my model a if I put my coil wire to the secondary spot but I have no way to attach it to the coil.


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if no luck here you may have better luck over on the ford barn there is a section for model As.as well as other years good luck