I made a "Y" junction with the S13 wiper motor using male/female spade connectors.
Create it by having the split have one end male spade connector and other female, you connect the male to the factory female spade connector and the female you made connects to the male on the wiper motor, those join together to send signal to your fan controller ign on wire, wherever it may be.
This way you don't have to hack into the factory wiring at all.
edit:
