joripokree,
What I have done in the past is use a bit of fuel line about 1" long and another piece of high tension wire.
1.Then remove the insulation on both pieces about 1/2" clean wire.
2.Put some WD40 on insulation and inside fuel line.
3.Slide fuel line over coil end of high tension lead.
4.Solder both pieces of high tension lead together.
5.Then slide fuel line over join.
This works quite well and does not look to much out of place.
