WIRELESS GAMEPAD V2.0 , Confusion about XBEE Pin mapping --> Softwareserial

Hello all,
a got lost identifiing usefull pins located at XBEE Header for use with softwareserial.

I have dificulties finding the "Arduino pin names" for all pins attached to the xbee headers.
Does some one give a simple pinmap table that displays wish XBEE header pin (1..20) is attached to the Arduino leonardo pin with Arduino pin name,


XBEE Arduino
Pin 1 --> ?
Pin2
Pin3
...
Pin 20


Thanks in advance
Marc