Thank you for your feedback! Maybe this one needed more clue scattered around but: You need to stun a spider and bring them (with your tractor gun) to the furnace at the other end of the cable. And repeat the process 3 time.
The lack wasn't a choice, but a lack of time. I didn't want to just staple some music found somewhere else so I left it like this. But it's interesting to know that it could be more appreciable.