Those are included with some batteries because the original bike may use a four or five prong receptacle instead of a 2 prong, and may have a different polarity on the pins. These match the battery that you are buying, and the idea is that you will install them correctly to get polarity right.
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I bought a SIlverfish pack a year ago, and one set of prongs was included, but not needed. If you already have a 2 pin battery, and positive/negative are in the same place, no need to change them out.