HP Compaq dx6050 MT Reference Manual page 153

Removal and Replacement Procedures— Desktop (DT) Chassis
6. If you are installing an expansion card in a vacant socket, remove the appropriate expansion
slot on the back of the chassis. Pull the slot cover straight up 1 then in toward the center of
the chassis 2 to release it from the chassis frame.
Service Reference Guide, d300, dx6050 319865-008 8–11