I've been trying to solder wires onto the pins of the joysticks on a gamecube controller but have encountered several issues. First, the solder isn't really connecting to the pin that I need and simply won't stick onto the place I need it to. Secondly, even when I manage to get it somewhat connected, it isn't fully properly functioning and tends to rapidly shake left and right when it should be staying still. I'm wondering if anybody has some advice for either how I could get it to solder better onto the pins or if there might be a much better location to connect it to that would work more effectively. The image attached is of where I'm trying to solder (I've removed the plastic joystick part).