Yeah, my first thought was to come into this thread and answer “I’ve identified it as the kind you replace”
Look at the wires in those pairs, they look like they’re falling apart from each other. Do you really want to risk an area in the wall where one of those wires being thin/having strands broken which is going to cause it to heat up inside your wall?
This has fire hazard written all over it. Just replace the wire and stop trying to take the easy way out. You’ll thank yourself later when you still have a house to go home to.