Brother MFC-8460N Servise Manual page 265

<Installing Procedure>
(1) Secure the Laser unit with the six cup S M3x6 Taptite screws.
(2) Put the flat cable through the Core and Protective film.
(3) Install the flat cable. (Refer to "HARNESS ROUTING" in Chapter 5.)
Laser unit
Taptite, cup B M3x6
Core
Protective film
Taptite, cup B M3x6
Fig. 6-29
(4) Install the Air duct into the Laser unit.
Laser unit
Hook
4a
4b
Hook
Air duct
Pin
Pin
Fig. 6-30
6-18 Confidential