I'm going to pull some new wires as the insulation on the old ignition wire is starting to break down. This is where the wire to the coil ends up under the dash. I've been through my shop manuals and they make no note of this part. Looks like a factory part, moulded onto the wires, with 4 input wires but only 3 outputs.
There is no evidence there ever was a fourth output wired, the thing is moulded for three. What would it be doing inside the plug?
I have not tried to separate the two parts - some of these old things just crumble - and I thought I'd ask before I cut the wires downstream from it.