k i bought MSD DIGITAL WINDOW SWITCH but theres something i can't figure out

RED WIRE= POSITIVE
BLACK= NEGATIVe
WHITE= NEGATIVE COIL

THEN my problem is with output wires

GRAY SAYS NORMALLY CLOSED. THIS WIRE WILL REMOVE THE GROUND SOURCE AT UR DESIRED ON RPM, AND COMPLETE THE GROUND CIRCUIT AT THE SET OFF RPM

YELLOW NORMALLY OPEN. THIS WIRE WILL PROVIDE A GROUND SOURCE AT UR DESIRED ON RPM AND REMOVE THE GROUND AT THE SET OFF RPM

and it says that yellow goes to the solenoid or gray so what do i do connect both of them 2 the same solenoid ??

oh and this is for a nitrous set up

 

Yellow.