I've got a house rabbit that ruined my speaker cables, forcing me to replace them. My intention was to join the new cables to the leads insider's the speaker cabinets. However I can't get the rear panels to budge. I've had to connect them externally for the time being, but still want to move the connections inside the cabinets. They are Sony speakers hooked up to a Sony SSA-190, which still works incredibly well. The cabs are made of MDF.