What is the black coax cable that is attached to the back of the motherboard used for?

[Berzerker22]

While replacing my cracked screen and reconnecting the white and red coax cables(antennas), I damaged one of the connectors for the black cable. If this is used for something that I don't use or need, then I won't bother trying to find a replacement. Unlike the red and white cable, the black one isn't available for purchase. Finding one has been very difficult.

 

[njdan30]

View attachment 269254
While replacing my cracked screen and reconnecting the white and red coax cables(antennas), I damaged one of the connectors for the black cable. If this is used for something that I don't use or need, then I won't bother trying to find a replacement. Unlike the red and white cable, the black one isn't available for purchase. Finding one has been very difficult.

That's an antenna the pinkish one is a heat transfer wire I'm pretty sure

 

[Berzerker22]

I thought it might be an antenna as well. I just don't know for which system though.