are they a part of the OEM harness or just run with it?
do they run through the plugs next to where you took the picture?

there is a blk/yel and solid white wire that runs from the alternator.
the blk/yel wire runs to the underhood fuse box. (fuse #15 - alternator SP Sensor 7.5 amp)
I'm still looking for a wht wire.

**edit**
that is a wht/grn wire.... it runs from the alternator to the ECU.