on the arduino pins 20 (SDA) connect to the uvga pin j1-10, pin 21 (SCL) connect to j1-9.
for the touch screen pin A1 to A4 the 4 wire of the resistive touch pannel. on A2 signal for the postion x, on A3 signal for the position y.
with the rx/tx communication will work but very slow for my future project.