Buick Riviera

I am installing a new replacement drivers air bag unit.1995 buick riviera. It is a complete unit with air bag horn radio controls. It has 2 plug in wire harness, 1red positive twist in conector for the horn, and 1 black ground wire with a copper spring type connector.I do not know where this ground wire goes. I can not see a spot for it. Please help.
Brad Sweitzer
March 19, 2007.

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