ZALMAN TNN 500AF User Manual page 25

⑤ Install the motherboard using the bolts (PWH M3x5).
I/O Shield
M/B Nipple
NOTES
1) To prevent short-circuiting the motherboard, nipples that are not required for motherboard
installation must be removed first.
2) Fix the motherboard to the TNN using all of the motherboard's mounting holes.
3) Be careful to not let the Rear-mount Thermal Blocks fall off from the back of the motherboard.
TNN 500AF
Bolt (PWH M3x5)
M/B