Confused on what that is in your picture ? I thought you have. 2013 model ?
The O2 sensor on the NC is directly above the item in your picture at least on 2012-2013 model.
Item 12 in the parts diagrams
View attachment 37934
View attachment 37935
Edit after MZ5 post: is that the O2 wire harness hanging off the edge of coolant recovery bottle ????
Yes, the harness runs through a slot in the recovery bottle. At least mine does.