My best guess from the location of the photo..
Looks like someone messed with the factory connector.
Were they connected?
Here is what mine looks like.
Under the yellow tape are 3 connectors:
2 blue w/ white wires and the center is green w/ red.
The green wire can be connected to either blue wires, but only one at a time.
I haven't touched mine, the green wire is connected to the left most blue wire.
The other blue wire is not connected to anything.
There is no sensor at this location.
Haven't looked into what its function is though...
Most likely something with the HVAC system.