Asus TS500-E6/PS4 - Manual (Page 46)

Chapter 2: Hardware setup 2-26
2. Shift the two hooked tabs leftward
and rightward respectively.
Removing the rear system fan
To remove the rear system fan
1. Unplug the system fan cable from
the REAR_FAN1 connector on the
motherboard.
3. Carefully take off the system fan. take off the system fan.
4. Follow the previous instructions in
reverse to reinstall the rear system
fan.