what does white plug on wiper motor do

i have found my power wire to coil, but still cannot try to start my fresh rebuild, they gave me wrong fuel pump, back to ballast resistor, i have a 4 spade ballast resistor by voltage regulator, do you which side i tie together or eliminate to bypass ballast resistor, or at least keep from losing so much power so my pertronix will run at full power all other problems are solved? thanks