I realized I still had an old setup in the garage.

I looked at the shock and at the top end, on one side, there is a recessed hex head side that is chamfered. It looks like there is a specific nut that fits in there so it can be held to the bracket.

Oddly the illustration above doesn't show it.

Hope this helps

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)