Brother MFC 8220 - Manual (Page 187)

13 - 6 OPTIONAL ACCESSORIES
WARNING
Turn the MFC power switch off, before installing (or removing) the
NC-9100h board.
2
Remove the side cover. Loosen the two screws, and then
remove the metal shield plate.
3
Loosen the two screws, and then remove the metal cover plate.
Cover Plate