Synology FlashStation FS3017 Hardware Installation Manual page 13

d Put back and fasten the screw that you removed in step 3-a so as to secure the newly inserted card.
4 Repeat step 3 to install the other add-on card for your FlashStation.
5 Put back the rear top cover by following step 8 of Add a RAM Module on FlashStation.
13 Chapter 2: Hardware Setup