1997 SL500 Visor hinge cover

New to this forum. Please help. Purchased visor hinge cover from dealer. Cannot figure out how to get visor support rod through opening in hinge cover.
Afraid to disassemble > Did it on another car and visor would never stay in upright position again. Also, purchased new hood emblem > Has two posts on back. Can`t get old emblem off hood. Looks as if hood latch assembly must be removed. Any help is appreciated.

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