Proper fan connector placement is shown in the figures below.
Connect 2 pin fan to 3 pin motherboard.
How to connect a 3 pin or 4 pin fan to the motherboard 1.
Fan has a 3 pin power connector.
Desktop board has a 4 pin fan header.
2 pack 4 pin molex to 2 x 3 pin or 4 pin computer pc case fan y splitter adapter cable 3pin 4pin to molex pc cooler cooling fan pmw sleeved splitter y power connector 3 9 out of 5 stars 13 7 89 7.
It should snap right into the 3 pin jack using 2 of the jacks pins.
The ends on mine are black and not white as shown.
The connector itself is only 5 inches in length so you may have to use an extension to reach where you want it too go.
Fans and on board fan headers are backwards compatible.
A 2 pin fan connector will connect to 3 pin mobo jack if you align the key on the plug little vertical plastic stripes.
There is no fan control.
The fan connector will have two guides 1 and these will need to line up with the tab 2 that is on the motherboard.
Next press down until the fan connector until it is fully connected to the motherboard header.
When using a 3 pin power connector with a 4 pin fan header the fan will always be on.