NEC N8100-2836F User Manual page 212

Chapter 2 Preparations
2) Slide Rail Kit for 2U N8143-129/130

Checking the outer rails
Check the direction of the outer rail.
Since there are markings of "Right" and "Left" on the outer rail, check the proper directions of right and left
with it. Likewise, check the directions of front and back with the markings of "Front" and "Rear."
Marking of Front left
212
Marking of Rear
Left rail
Marking of Front right
Express5800/R120h-2M (3rd-Gen) User's Guide
2. Installation and Connection
Marking of Rear
Right rail