So if I found a game system that uses an analog stick, and had bought one analog stick, which gpio pins would I solder it to?

So I do have continuity from both the 5v gpio/test pad, and I made sure not to force the cable in. I then checked for bent pins but all of them are perfectly fine.

so i have all the same problems. i checked for continuity on D1,FB3, and the two GPIO pins for 5v and they all worked.i also checked the connecter cable, and the battery is fully charged.