Help! What did I leave off?
 

So i am putting the dash back together after adding a mmi unit to my ccc.
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There are five plugs in the attached image. One is for the hazard switch. Three go to the a/c control panel. The fifth is a small three pin/two wire plug.

I don't recall unplugging it and there is no obvious socket for it.... Any help?

Yes I do feel dumb.

https://cimg2.ibsrv.net/gimg/5series...14cd2d3068.jpg
https://cimg8.ibsrv.net/gimg/5series...2fee19c3f5.jpg

Solved thanks to Sean Jordan (you deleted your answer but you made me open it up again.

It is for the pictured component. I assume it is a temp sensor but not sure.

https://cimg6.ibsrv.net/gimg/5series...a39dc95fa8.jpg

https://cimg3.ibsrv.net/gimg/5series...e92f5b8700.jpg

Do you have a DTC button on the bottom.

I never would of guessed that. I've never seen anyone unplug that before. Lol.

I must have done it while screwing around with the other plugs!

​​​​Glad it was behind just one piece of trim....

Welcome to the Mechanics School of Hard Knocks.

If that's the hardest knock I get with this car I'll county blessings!