Nikon SMZ25 Instruction Manual page 111

 Cable clamps
Four cable clamps and four fixing screws (pan-head M4-8
mm) are supplied with the P2-FMDN Focus Mount.
The cable clamps are used for clamping the P2-RLYC Relay
Cable or the fibers of the P2-CIA Coaxial Epi Illuminator to the
rear side of the focus mount.
The cable clamps are not attached by default. Attach them as
required.
Use cable clamp fixing screws for fixing the relay box metal
fitting to the focus mount when using the P2-RLY Relay Box
for epi-fluorescence microscopy, as well as for fixing the cable
clamps.
(See Chapter 3, "3.2 Compact System Assembly – 2 Attach a
focus mount. -  Clamp cable attachment.")
Chapter 8
Functions and Operations of the Devices
Cable clamps
Clamping the P2-RLYC Relay Cable
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