that looks like the plug for the 194 bulb in the bottom of the headlights. i could be wrong though, it could go to something else, i'm not familiar with all the connections in the bay.
If you buy an OEM fog setup, it uses that connector. If you look inside the car, under the steering wheel, you will see the other end of it.
Step 17
https://www.handa-accessories.com/accord/accord01fl2d.pdf
Air cleaner intake pipe part is a typo though. That is a reference to the V6.
Thank you so much! I knew it looked like it hadn't been used lol