It's a wiper for the distributor lobes and there is usually a little bracket that it fits in. put a dab of grease on one end and inset it into the little bracket so it just makes contact with the distributor lobes. Some models use them and some don't. it yours doesn't already have one, it's not used. just smear a SMALL dab of grease on the lobes. It's to keep the rubbing block on the points from wearing.
