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ONBOARD
Onboard connector
Power supply connector
tab
clip
Most male power supply connectors will have twenty wires, seven of
which are black. The black wires will be in the middle of the connector.
The easiest way to orient the connectors properly is to line up the
plastic clip on the male connector with the tab on the female connector.
The plastic clip should be facing the edge of the motherboard.
Align the plastic guide pins on the male connector with their receptacles
on the mainboard. You may need to hold the lead at an angle in order to
properly line it up with the onboard connector. Once you have the guide
pins aligned, press the lead into the connector so that the plastic clip on
the lead snaps into place and secures the lead to the connector. Please
see the figure below.