What NormK describes will work though what I do looks a lot more professional. Note solder will not work on the carbon fiber leads

These leads are 5mm version. Strand wire (tinned copper) center conductor.

Here is a picture of the lead remove from the coil on a Ryobi 700R brush cutter (string trimmer) coil. A little hard to get out due the epoxy they used but patience is key; although, my fingers were numb from the freezing temps here (about 15-20 min). It kinda hard to see the pin but that is the best I can do with the current camera I have. The pin on this one is a straight version. When I replace these leads I use a two part epoxy to glue them back in place. Just measure the depth of the hole and mark the lead as to know when you get it bottom out. In this case I did need to trim back the cup as I damage it some but it is still above the coil surface.

[Linked Image from i.imgur.com]
I know it seems like a lot of work but when things are no longer available or hard to come by it worth it to at least try. This should help on other coils too as the OEM prefer to just sell us new coils and many of the younger techs are just plain lazy.