..there is the USB connection!! I can confirm that the two pads marked as Data+ and Data- are working. I just flashed my device using them, 5V+ and GND. The device was only recognized over USB while also the battery was attached. That's a little bit tricky if you have it open and wires to the pads connected, but it worked! YEAH I got my phone back ))
So it'll charge by shorting data+ and data- with 2.2ohm resistor? But obvisously a data connection will not be possible then. So how can we can get a working data connection using those pads then?