When I first got my tank I pulled and my wire broke off, from inside the tube like yours.. Well it was really easy to fix, take a screw driver or something and but it on the pin that it is to be soldered to and push it towards where the mouthpiece would be, and it will just pop out, make sure you don't lose the rubber grommet that holds it in place.. like on a regular atomizer, or cartomizer (if you ever took one apart).. it looks just like a cartomizers center pin.. Solder that side first with a slightly longer wire, put rubber grommet in place, make sure you seat it all the way down flush with the hole, then slide the wire back through the hole, push the positive pin down.. solder the center pin that connects to the PV bend wire a little to fit inside tube, and press it all back in place and you are done

I know it might be a little confusing through text, but if you think it is needed I will take mine apart, and do pics

Just send me a PM, and when I get time I will take pics of step by step and post it on this thread