Where does this belong?

Hmm, not your OBD II connector is it? Roughly in about the right location but the connector looks different to mine so I'm not sure....

Every 8er is prepared for electrical moving stearing wheel. You don't have this feature, right?
Maybe this one goes to a connector (6 pin) at the very right side of one picture here: http://www.8er.org/forum/showt…hlight=lenkradverstellung

I was looking trough the ETM. At the end the section 7000 lists all connectors including the amount of pins and color.
There are not many 6 pin black connectors in the interior. (I counted 13)
The ETM is a scan so there is not possible to search in it or have a X-reference as with the newer WDS.
I was looking for the obvious ones (seat, mirror, steering) but none of them had the same wire colors as on your image. (I was looking in the 1995 ETM tough.)
Unfortunately I have no time to look trough the whole ETM to find the connectors on the diagrams and check for the wire colors, but this is what you could do Dick if you have time.
Check the ETM for your model year, go trough section 7000 and find 6 pin black connectors and then look for the X numbers (denoting the connectors) in the diagrams. Then compare the wire colors.

Cheers
Steve

I googled the number and now I think the Inclination indicator is pluged in there (if you have alarm system):
http://2009.bmwfans.info/parts…nic_systems/alarm_system/

(On an E39 it should be)

That is connector X272 and it is only connected on E31 equipped with the sliding/tilting sunroof. The electrical troubleshooting manual (ETM) is wrong about its location which is probably why no one found it.

[COLOR="#0000FF"]Moderator note: Moved the topic to the more appropriate Main Discussion forum[/COLOR]