NEC ExpEther-2S User Manual page 39

Installing a bracket on the general-purpose kit
2.
Install the rear mount frame in the general-purpose tray to be on the back of the unit.
After fitting the part in the slit of the general-purpose tray, fix it with 3 screws (M4x10) from the
bottom.
Install it up to the third slit from the end.
Tips Install the rear mount frame over two slits.
Installing the ExpEther IO Expansion Unit (40G)
3.
Insert the bracket so that the rear bracket attached to the ExpEther IO Expansion Unit (40G)
fits in the raised part on the rear mount frame attached to the general-purpose tray.
Up to here
Rear
19
Fix it with 3 screws (M4x10).