Anyone know what this wire is that I smoked?

Yeabutt, if you look at where it plugs onto the resistor, that sure looks like an OEM type plug/connecter/wire/thingamajiggy......

Also, look at the bottom left corner of your red line. There is a DK Blue wire connected to the DK Blue wire coming of the Resistor. In actual practice, that junction could have been at the Resistor, rather than in the middle of the wire.

Schematics didn't always match the physical wiring........

My bet, is, that is the missing Link so to speak..........