well, took a look at mine, and it is hard to tell 'exactly' what they did...but I took a couple close-ups with the digital camera...here...2 pics

Therer are 2 wires coming to the alligator clip, one is simply wrapped around a little screw in the clip, the other is laid up the jaw, and 'seems' to have some silvery-white flat thing under it. Never having used a 'transducer' I wouldn't know if that is what is there. The whole area is then sealed with some sort of epoxy....hope the pics tell you something...