I don`t have an Electrex regulator but according to the plan it`s:
Electrex to original wiring
yellow -> both pink (alternator)
yellow -> red (alternator)
white -> light blue (charging warning light)
red -> red/black & orange (battery +)
green -> black (battery -)
(the brown wire of the Paso wiring loom formely going to the regulator is not used any longer)
Note: If the measured voltage between the two yellow wires from the alternator (which are pink when they get to the regulator/rectifier) is between 50-100V you should wire the reg/rect as shown on the first picture of the instructions hence connect yellow 1 from the reg/rect to one yellow(pink) wire from the alternator and yellow 2 to the other. In this case the red wire from the alternator isn`t used and can be isolated. Install like this if the first wiring instructions don`t work. (To check simply connect a voltmeter to the battery. When the engine is started and the regulator/rectifier is connected correctly the voltage will increase i.e. from 12V to ca. 14V)
https://app.box.com/s/r16ixjegwfl7aq3ybd0cfrom the Paso wiring loom the brown formely going to the regulator is not used any longer.
Someone correct me if I`m wrong.
G.