Wiper switch / dash harness help - 65 Barracuda

Ok to preface this, I am helping someone put this car together and all the parts for it came in a box. We have 2.5 wiring harnesses and I cant figure out what all to pulg into the back of the Wiper switch. According to the wiring diagram there are supposed to be 6 wires but I can only find 5 and the swtich only requires 5. There are 4 wires on one connector (dk blue, pink, tan and yellow) and then 1 loose wire (white) Of the 4 on the connector only 3 of them will actually plug into the back of the switch. due to the odd ball "l/w" shape of the connector on the harness. This is a standard "2 speed" (on / off) switch and I assume the wiper motor is factory.

Can anyone shed some light on this for me? Do I have the wrong switch?

Thanks for any help!!