Gents, my old bayou 4x4 300 has 3 yellow wires going into a multiplug and then to rectifier
all 3 have corroded out, so now I have no idea what goes to what, 3 white wires are coming out of the engine and join to the 3 yellows before heading off to the multi plug.
the wiring diagram does not help.

 

They will be the three phases of the alternator and can be wired any white to any yellow.