Siemens SIMATIC NET FC FO LC GK1900-1RB00-2AB0 Assembly Instructions Manual page 15

15. Close the crimping pliers (D) as far as the limit stop
17. Insert the LC connector with the fiber into the
cleave tool (F).
Protective cap
20. Push on the protective cap.
13
16. Push the anti-kink sleeve onto the LC connector..
18. Close the cleave tool (F).
19. The fiber is detached from the LC connector.
Note: Dispose of the fibers in the fiber container (E).
LC duplex
21. To use the LC connector as a duplex variant
reverse the double clip.
Assembly instructions
FC FO LC Plug
A5E36312721-AA