It's the same as a Stick, the neGcon just has the X-Axis (left/right) where the Stick has and X-Axis (left/right) and Y-Axis (up/down), so you'd just connect it to the spots the X-axis of the Stick are using, which going by that diagram is A/B/C, with B being the Wiper (center pin) then A and C being power/ground, and if ya get the power/ground backwards it'll just work backwards is all and swapping them will fix it.