Thank you for your quick answer!

Nonetheless, that is what I was fearing. There is no such connector in my car on that position. I can clearly see that there are some tabs foreseen to put the connector however.

I believe the connector might have been used for the viasat system which is also in my car. Maybe you can tell me were the original power connector originates from (under the back seat or something) so that I can backtrack this and put the connector back in its original place and install the BMW BT.