Hello, i am new it the soldering world. (see image below) does it matter where i solder the wire? are the number 1,2,3 the same or are there anny diferences?

Wire 1 to the signal from the pickup, wire 2 to the output, and solder 3 to the casing.
Quote by R45VT
Bastards.
there are differences between the lugs. a potentiometer is a variable resistor, so as you turn the knob the resistance between the center lug and the outside lugs changes. with the knob turned all the way one direction, the resistance between one of the outside lugs and the center lug is close to zero, and then between the other outside lug and the center is the full resistance value of the pot. turn the knob the other way and you reverse it.
Quote by jof1029
there are differences between the lugs. a potentiometer is a variable resistor, so as you turn the knob the resistance between the center lug and the outside lugs changes. with the knob turned all the way one direction, the resistance between one of the outside lugs and the center lug is close to zero, and then between the other outside lug and the center is the full resistance value of the pot. turn the knob the other way and you reverse it.

Strictly speaking, it's actually a voltage divider rather than a variable resistor. It can act like a variable resistor if you only hook up lugs one and 2, but you won't be able to use it to mute an alternating signal, hence why you have to solder lug 3 to the ground. That way, the signal just takes the path of least resistance to the ground when the pot is turned all the way down.
EH

"Show me war; show me pestilence; show me the blood-red hands of retribution..."
if you dont connect anything to one of the ends, it is a variable resistor. if you connect something to both ends, it acts as a variable voltage divider. so strictly speaking, what it is depends on how you connect it.

i was trying to explain it in a basic way that would make sense. if someone is asking if it matters which lug to use, i sort of assume they dont know what a voltage divider is, so i tried to keep it simple.