Furuno NAVNET 3D MFD8/12/BB Installation Manual page 41

6. Use the four plate screws (M3x10, supplied) to fasten the fixing plate and boot
cover to the display unit.
7. Slide the rubber stopper into the hole of the rubber boot, and fasten the cable tie
to hold the rubber boot and stopper.
Note: When only the Ethernet, Power, DRS, DATA1, DATA2 and NMEA2000
connection are used the Waterproof Connector boot is not necessary.
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