I'm adding a plug to a closet so that I can put my server and router in there.
I am trying to daisy chain it off of the nearest plug, but when I try to remove any of the knockouts they won't budge, presumably because it came with the house 75 years ago and is rusted shut.
The other issue is that I can't simply remove this box because the box was placed on the metal mesh that was eventually plastered over, so it is literally plastered to the wall.
Any thoughts on the actions I can take to get this wire inside this box or is it a lost cause?