your better off not altering the wiring if its a street car, or your pump will be running 100% all the time, and this sucks for two reasons:
1- the noise! especially at idle when there is nothing to drown it out
2- the fuel will get hot, you pump so much through but it all comes back to the tank, then goes through the pump again... there are a few old threads about the " hot fuel " problems.
i would get a nismo/tomei pump too, as they are sooooooo easy to put in compared to walboro or bosch and are quieter too in my experience