Wiring a controller port led

Hi,

I'm just beginning to look into modding one of my gamecubes, and I've always wanted to do a mod that involved controller port LEDs that light up only when the controller is plugged in. I've done some research into adding controller port LEDs and I've noticed that there are 2 different voltage lines, a 5V power line for the rumble motor, a 3.43V line for the data, and a 3.43V line for the logic board. My assumption is that I can wire an LED to the data line
(pin two in this image:
gamecubecontrollerboardnd0.jpg
)
that will only activate the LED when the controller is plugged in, like I want.

I have only heard of one other mod like this being done where the port only lights when a controller is plugged in, though the video attached to the post is no longer available so I cannot verify. Also for anyone confused, the LED would be located behind the little nubs that label which port it is (above the actual ports).
 
The data line is always active, even if a controller is not plugged in. Each 16ms (ish) the data line makes 9 falls and rises
 
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