This is the "back" side of the board - it has two large white connectors on it. On the bottom connector one wire needs to be soldered to the 5th pin from the left on the bottom of the connector:

Close up of connector with red rectangle around correct pin:
On the "front" of the board (the side with the OK button) the other wire needs to be soldered to one side of one of the switches. The correct position is denoted with a red rectangle:
Here is a picture of a wire soldered to the correct point:

Now, with both wires connected, you can use an ohm meter and verity that the meter reads "~0 vdc" when you push the "OK" button (the button in the center of the up/down/left/right buttons".
Now, we need someone to try it out! If needed I can ship my info center so no modifying of the OEM piece is needed.
There may be different versions of info centers, I'm not sure. The one I have has two white connectors on the back to plug in to the car.
