Asus ROG MAXIMUS Z790 HERO LGA 1700 ATX Motherboard - Manual (Page 51)

ROG MAXIMUS Z790 HERO 2-9
Chapter 2
Thermal pad Bundled rubber for M.2 backplate
D. (optional) Install the bundled rubber for M.2 backplate to the 2260 M.2
length screw hole if you are installing a single sided M.2 storage device. DO
NOT install the bundled rubber for M.2 backplate when installing a double-
sided M.2 storage device.
E. Install your M.2 to the M.2 slot.
F. Rotate the M.2 Q-Latch clockwise to secure the M.2 in place.