Asus N751J E-Manual page 102

G. Place the new HDD with its PCB (printed circuit board) facing the
HDD bay. Ensure that the port connectors of your HDD are not
obstructed by any part of the HDD bay.
H. Reattach and secure the HDD with the screws you removed
earlier.
102
HDD bay
new HDD
Notebook PC E-Manual