Actually, I think they are supossed to be there. If you read the instructions on IFI's site it says to "Trim this tab to ensure a tight fit with your PWM cable". Ours too came unlabeled, but so are the ones on their site. Bad ideaif you ask me, and it makes me forget which is brake and coast on the jumper.
http://www.ifirobotics.com/victor-88...r-robots.shtml