I bought a house a few months ago and I’m still trying to figure out all the wiring. I found these coming out of a cabinet in the kitchen.
I think (?) the black one is a cut-off coax cable. There’s a LOT of coax in this house, so that seems straightforward (but I would still love if someone can confirm!)
I’m not sure about the other ones. They don’t look electric, as I’d expect electric to be black + white + copper, like the rest of the house.
There is supposedly a speaker system in the house (I see speakers) but I haven’t figured it out yet. Could that be power for the speakers? I’m not familiar with speaker wire setup. If it’s speakers, why would there be so many wires?
Looks like it could be speaker wire for stereo, left/right channels
Is there another end or are there speakers in the ceiling or walls?
Do you have a volt meter? You can use that to match the ends, twist one set together and see which one is closed.
If that was connected to a wall jacks, someone is an asshole for not leaving it. The part tools to strip and rebuild the connectors aren’t expensive but they a one and done tool for a diy-er. Maybe you know someone that can borrow you the tool.
These days, there are a lot of wireless options so you could also shove it the wall and buy a blank plate to cover it.