I concur that the green is the washer pump.
The brown is your OEM foglight connector. It runs back inside the car and there is another pigtail in there. It was cheaper for Honda to just make one harness with expansion rather than different harnesses for different options. If you were to add OEM fogs, you would plug your external harness into that. The internal portion plugs to the end under the dash, near the fuse box.