Bluetooth on X22

[KillBill]

Is it possible to install IBM Thinkpad BlueTooth Daughter Card (p/n 12P3872) in the CDC slot of IBM X22 ???
Everywhere in descriptions i find that it only fits X23/24 etc. What is the difference in the X22? Is the slot occupied with network card???

EDIT:
found out that CDC slot is occupied with EDC (Ethernet Daughter Card). Are there 2 CDC slots or just one on X22?

TIA