HP ze2300 - Manual (Page 115)

Removal and Replacement Procedures
Maintenance and Service Guide 5–15
6. Spread the retaining tabs 1 on each side of the memory
module socket to release the memory module. (The right side
of the module rises away from the computer.)
7. Slide the module 2 away from the socket at an angle.
✎
Memory modules are designed with a security notch 3 to
prevent incorrect installation into the memory module socket.
Removing the Memory Module
Reverse the above procedure to install a memory module.