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8.4  Video/RGB Unit
8.4.2  Installing procedure
6 Tighten the extend interface relay board installed by the step   within the specified torque 
range (0.36 to 0.48N·m). (2 places)
Removing the video/RGB unit
Before removing the unit, unscrew the extend interface relay board fixing screws.
(
 above 
)
7 When installing an extension unit on the unit, refer to the following.
  8.1.3 Installing multiple extension units in layers
When not installing an extension unit on the outer layer, cover the top of mounting screws (4 
places) with accessory stickers in order to avoid receiving static electricity.
Keep the connector cover fixed.
Keep the sticker stuck as it is.