notice how the ones I posted above have "two" black wires? wonder why
I also have a coil setup where it uses a metal tab thats shaped ever so that when its put into the connector cavity, its also covering where the ground wire screws into, and you just secure it with a screw/bolt on the corner of the coil iron thing.
I also have a non ground wire coil in the picture above, its on the right
In my first picture you can see a well worn advance weight thats in my 1980 gmc , they used ot be rusty and stuck. chased an intermittent high idle that couldnt kick down or lower But would eventually lower if you played with throttle in quick snaps (more than a single one like a fast idle kickup) turned out the weights were just staying advanced outward and werent coming home lol
love that.