Might be connected to… Nostrils? Haha.

I mean it's not might, it is connected to the nostrils. that's why for doctors it's ENT and the infections can spread between those areas.

https://chicagoent.com/ear-nose-throat/how-are-the-ear-nose-and-throat-connected/

The ears, nose, and throat are part of your upper respiratory system. These three are linked through several canals and tubes and share the same mucous membranes.
Because they’re all connected, the ears, nose, and throat can function as one system, with each part supporting the whole. That’s why when there’s a problem in one area, it may also affect the other two.
For example, when you get a cold, you may also have a cough, sore throat, ear pain, and stuffy nose. Even though the ears, nose, and throat have very different functions, they all work together to help you hear, breathe, and talk.
The throat connects your nose to your mouth and links to the esophagus and lungs. Your ears also drain into the throat.
The eustachian tube drains fluid from your ears into your throat via the nasopharynx. At the same time, the nasal passages connect to your ears.
Through these routes, a viral or bacterial infection in either your ears, nose, or throat can find its way into the others. For instance, the ENT system can be affected by the same problems, including infections, congestion, swelling, and post-nasal dripping.