Acer AR380 F1 - Manual (Page 58)

3 System upgrades 40
3 Insert the ODD into the system chassis. The drive is properly
inserted if you hear a click and the locking tab locks into place (1).
4 Plug the power and data cables to the new optical drive (2), (3).
5 Observe the post-installation instructions described on page 27.
Note: I-SATA5 port is reserved for connecting to the installed
optical drive.