>>3351458Just picked a random one:
https://www.amazon.com/0-75mm-Upgrade-Replacement-Earphones-Headset/dp/B074WN5B66The pins are super tiny so I could maaaybe see them fitting in there if you're super generous with regards to size distortion due to perspective.
Actually, you know what, come to think of it, it probably IS just a power cable for something else and it's simply hanging on the same hook as the headphones.