Wrap the damaged area with some aluminum tape or something to prevent any chance of interference and it will be fine. You can also buy wire braid that is the same as what is damaged. You would have to remove the cap to slide it over and then replace the cap with a new one. Easier to just put a wrap of metal based tape over the damaged area if you don't want to get fancy. DA or any igntion place like CH (closed) should be able to repair it for you if you have the time to send it in.