I pulled this diagram from Google and changed it slightly to fit my parts and car. But I am not 100% it is correct and not sure where to put the blue and grey wire from the window switch... The grey wire goes to input for the tach signal. (Not really sure where is the best place to get splice in to?) The blue wire goes to the negative/ground side of the device that I want to activate. (Does this go to the ground of the solenoids?) Any help?