PCWorks: ATX power supply with extra 4 prong plug?

what is this plug small square 4 prong with 2 yellow and 2 
black wires.
it measures 12 volts.
can this also be supplied from any yellow 12v lead??

larry

-- 
Schneider TV & Electronic Inc.
5415 N. Wooster ave.
Dover, Ohio 44622       www.geocities.com/schntv2000/
330-343-0768         FCC. first class & Extra class
K8WLY
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