It could be what the other commenter said, but it could also be some kind of coaxial thing like for an old TV. I’ve seen cables with the circular loop end that would go on the part where the cable would go, and you need a nut to secure it. The other end, though, looks like a molex power connector, which is the only reason I think it could be some kind of grounding thing.
It’s not a great angle though; I can’t see well enough up the yellow part’s inside to see what the prongs look like.
![[solved] What is this weird cable?](https://discuss.tchncs.de/pictrs/image/f4346061-15ce-4595-977f-ab8e66eba98d.jpeg){kind=link}
It could be what the other commenter said, but it could also be some kind of coaxial thing like for an old TV. I’ve seen cables with the circular loop end that would go on the part where the cable would go, and you need a nut to secure it. The other end, though, looks like a molex power connector, which is the only reason I think it could be some kind of grounding thing.
It’s not a great angle though; I can’t see well enough up the yellow part’s inside to see what the prongs look like.