Where and how do I install a new Neutral Safety Switch in my 1992 300CE auto trans?

I assume it is near the base of the shifter arm, so it can be directly linked to the position that the arm is in, but would like to know exactly how to find the switch and install the new one. I have the shift area open, but don't know what to do next.

Thanks, Ben Carter

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)