The exact same thing happened to me. You should be able to buy a new one from BZ for around a tenner. Or you could buy the medium repair kit for about £30 which I'm sure you get the battery harness and most of the other bits you'll need too.
i just soldered mine back in,or if you go to maplins and take it with you they will find you all the stuff you need and you just have to put it together