2007 BMW 750 Li

I purchased a new AUC sensor to install in my ’07 750 Li. By all accounts, it is mounted to the upper fan shroud on the passenger’s side. I have spent the last 2 hours searching for it, and have removed all the components that I should need to in order to find it. It appears that it is suppose to be mounted in the area marked, but there is no sensor, no wire…nothing but the fan motor wiring (the dangling connector is for the mass air flow sensor). Does anyone have any ideas where this is located on the vehicle?? I have looked around the cabin filters/firewall as well and nothing.