Brother MFC-J6510DW Service Manual page 164

(6) Remove the CIS flat cable cover and the harness cover by inserting the tip of a flat
screwdriver into the slots (indicated by arrows in the figure below) and lifting up those
covers. For easier removal, start from the rear and finally pull out the tabs.
Harness cover
ADF & document cover ASSY
Scanner cover
(Scanner unit)
Upper cover
Tab
LT cover
(For models with paper tray #2)
3-39
CIS flat cable cover
Tab
Lower cover
Tab
(3_005)
Confidential