MSI MAG B660M MORTAR WIFI DDR4 Micro-ATX Motherboard - Manual (Page 19)

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6. Put the M.2 SHIELD FROZR heatsink back in place and secure it.
6 6
6 6
For M2_2 slot
1.
Secure the supplied M.2 standoff according to your M.2 SSD length if need.
2. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
3. Secure the M.2 SSD in place with the supplied M.2 8.5H screw.
30º 30º
3 3
2 2
1 1
8.5H screw
Standoff