One side of the metal part is connected to Vcc (3.5V) and the other side is connected to the microcontroller on the gamepad. To use Massage me input as buttons, we connected the Vcc to one side of the touchpad in the jacket, and the other side of the touchpad goes to the input connection of the microcontroller of the gamepad. 3.5v can be taken directly from the gamepad VDD (see picture). If it is not written on the circuit, it is the pin connected to the 5 th pin of the playstation plug (more info from
www.technik.net)
The Massage me Jacket has 10 different kind of buttons, up, down, right, left, triangle, circle squire ,cross, select and start. Each connection to the gamepad input for these buttons is extended with a cable (red cables on the picture).