HP Vectra VL 5/xxx - Manual (Page 44)

2 How to Install Accessories In Your PC
Installing Mass Storage Devices
32 English
4 Remove the two bezels from the bottom shelf. The bezels snap in and
out, and can be removed without any tools.
5 Support the power supply with your hand (to prevent it falling out)
and carefully turn the PC onto its side.
6 Slide the hard disk into the bottom shelf, supporting the disk with
your hand.
7 Align the drive with the holes in the bottom of the PC. Support the
drive with your hand while securing the drive with the four screws
provided.