Controller port connections?

[emu_kidid]

Just curious to know what the minimum number of wires would be to wire up a controller port? I still want it to have full functionality of the controller, including rumble. I'm thinking of making some custom port like a 3.5mm to a GC controller extension cable dongle for a project I'm working on since the controller port itself takes up so much room.

[Ashen]

4 wires.

Data, 3.3v, 5v and gnd.

[emu_kidid]

thanks - pics soon, I promise

[Hugo_Peters]

No. 2 wires. Ground + Data
Data line includes 3.3v
But without rumble.

EDIT: I swear to god this works:

Pins with red circles and arrows are the ones that need to be connected as a minimum.

[Ashen]

I still want it to have full functionality of the controller, including rumble.

[Hugo_Peters]

I still want it to have full functionality of the controller, including rumble.

Darn. Sorry!
But still, I guess 3 wires are enough. (2+1 for rumble)