if your talking about In-Wall volume controls, Those are a real PITA. Theyre definetly right up there at the top with things that frustrated me when I was doing installs. You really just need to take your time and strip the wires down the perfect amount and if need be, cut some of the strands off so its not too big to fit into the little connector.
pin style connectors used on an inwall control wont be any better really. You kind of just have to stuff them back in there and hope everything works when your done. If they do touch chances are your amplifier has short circuit protection as many of them do, In which case you just turn it off, fix the problem and it should work fine again.