Acer Altos G540 M2 - Manual (Page 98)

3 System upgrade 88
(3) Insert the card into the selected slot.
Make sure that the card is properly seated.
Replace the screw to secure the card in place.
(4) Connect the necessary cables to the expansion card as
required.
5 Observe the post-installation instructions described on page 42.
When you turn on the system, the BIOS setup automatically
detects and assigns resources to the new device (applicable only to
Plug-and-Play expansion cards).