lilypad usb

I have a lilypad usb and a lilypad xbee shield.
I want to connect the two, but on the lilypadusb i cannot find the TX RX pins.
Could anybody help me?

The Lilypad USB board doesn’t include connections for the hardware serial port. If you are good enough with a fine soldering iron you can connect very thin wires to pins 20 (RX) and 21 (TX). Pins are numbered counter-clockwise from the clipped (top right) corner of the chip. That puts pin 20 is on the left side of the chip, third from the bottom. Pin 21 is on the left side of the chip, second from the bottom.

i have the same problem but thanks for the answer

Software Serial is also an alternative.