I have a bad circuit breaker that controls my stereo and accessories. Is this most likely a 5 for 10 amp? also I opened up the back of the panel to remove it. I found that there is a bar with fins connected to each breaker that I assume is for the common or negative side. It needs to be removed to take one of the breakers in that row out. It seems to be attached very solidly. How do I remove it?