Brother HL-8050N - Manual (Page 179)

A - 21 APPENDIXES
4
Loosen the right and left screws as shown in the
illustration to uninstall the top cover of the paper exit.
5
Insert the right and left tabs of the offset catch tray into the
holes at the top of the printer (1), and then slowly lower it
down on the top of the printer (2).
6
Secure the screws at both ends of the bottom of the offset
catch tray.