FiTech EFI system

I know this has been asked a couple of times but I saw no clear answer. Where did everyone find a good place for the white wire 12v key on and crank. BTW I am temporarily running factory electronic ignition with ballast resistor until its up and running then letting fitech control timing.
Thanks
Plus I got it from johnny at pace, no issues ordering there except a 2 week wait.

I hooked mine to the 12v side of the resistor works fine