Ibanez Bass re-wire

[clearerphish]

I just bought a used Ibanez EDB-405 5 string ergodyne bass from a friend. The last pot (lowest pot - closest to the floor - if you hold the bass up with the headstock pointing at the sky). has a wire that has become unsoldered. I can absolutely re-solder the pot, but I want to know I'm doing right. The pot has three tabs. The tab onb the left is soldered to a cap which is soldered to the body of the pot and also to one of a pair of wires coming out of a green housing. The second tab has a white wire soldered to it which is the other half of the green housing. The third tab is bare (even of solder, which gives me pause) and I have a loose gray wire. I would think that I would solder the gray wire to the third tab but I don't want to kill anything. What should I do here? What is my next step besides tossing a cowboy hat on and grabbing my soldering iron and going buckwild?

 

[Dan025]

it cant do any damage if you do. just undo it later if needed. that is weird though. it is clearly a tone control with the cap and all but the tone 9 times outta 10 only uses 2 lugs on the pot. a photo of the open control cavity would help. or the model of the bass might give someone a clue or a basis for looking up the answer.

 

[clearerphish]

Bass Model is Ibanez Ergodyne EDB-405. I'll try to take a pic tonight after band practice.