The tip from the wrap or perhaps the "terminator" of the foil at the base in the strip beside the outer jacket is often difficult to see and to locate. If you will find this "terminator," you can nick it with a little cut with a knife and peel it https://gogogobookmarks.com/story19555021/how-much-you-need-to-expect-you-ll-pay-for-a-good-cable-tidy