First, the old style switch only routes the 12V, not the ground, so there is no way of doing damage while trying different combinations.
If you are putting the original 4 spade switches things are simple. The double wire is 12V (it is double to cascade 12V from one switch to the next). The other two wires are up and down wires for that window. The double wire connects to the upper right spade and the other two connect to bottom right and upper left respectively. Once you get the window to work you can reverse things by swapping the last two wires or by turning the switch around 180 degrees.
That is my recollection.