What is this connection? And do I need it?

Putting all the parts together in my case and saw this connection, can anyone tell me what this is for and if I need it? If I need it where does it connect to?
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More about what connection
  1. Best answer
    That is an extender/fan connector. You can hook a fan directly to your power supply if thats where it is connected. You dont really need it, only if you're actually going to use a fan with it ;)
  2. Best answer selected by sillysoft.
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