How can I properly remove and install an optical drive from my HP ProBook 640 G2?

To remove the optical drive: Power down laptop, disconnect devices/wires, and then sequentially take out service door, battery, hard drive, SSD (if present), WWAN module, WLAN card. Loosen a single Phillips M2 screw securing it in place and carefully lift off the drive from its slot for replacement or repair needs. To install: Align new drive accurately into bay, secure with relevant screws, reassemble all previously removed laptop components in reverse order afterward. (Page 46)