IBM ThinkPad T20 Hardware Maintenance Manual page 116

When installing: Make sure that the guide of the slot is
112
ThinkPad T20, T21, T22, T23 (MT 2647/2648)
firmly attached 1 and if the eject lever
has been poped out, push it back in the
direction of arrow 2 until it snaps, and
then push the upper-right corner of the
slot 3 to fix it firmly.
3
Removing and replacing a FRU
1
2