I bought a replacement battery for a 160 GB iPod Classic off eBay, but there is no male plug attached to the leads of the battery cable. It's just the bare leads. Is this normal? How do you attach the battery cable to the plug to fit it in the battery port otherwise? I can't find anything online about this. It seems like I'm missing a piece. Are you supposed to harvest the male plug from the old battery? Very confusing. Any help would be appreciated.