Hi ET,
Check inventory - The security seal chain is a metal chain attached to the security pass you got from the security office. Separate the pass from the chain.
Also try this other solution of Crash for that elevator:
SPOILER:
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Get the wire from Elevator A panel. Use the SITO key to open the panel. Use the wire cutter to cut the wire. Go back to the Dark Tunnel and enter the elevator. Open the elevator panel with SITO key and attach the wire inside. Take the elevator to the lower ground.
Crash\'s WT fugitive I will check some more!
MaG