IBM ThinkPad X30, ThinkPad X31 (MT 2672 Manual page 119

Removing and replacing a FRU
For X31 series
When you order a new base cover, you also need to
order the label kit. Check the FRU no. on both
FRUs first and order them at same time. Stick the
label kit on the new base cover as indicated in the
following figure.
115
ThinkPad X30, X31