I have the same issue. Same TM too. I just tie wrapped the wire around whatever part of the shaft that was left above the drop in mount. And left my wire loose and attached the transducer to the foot of the TM. I got leave. Sme slack in between but I works okay. Wish it was better. Just can't do Over 270 degrees. Or your wire from the graph will get twisted Just gotta watch. It. And make sure your prop doesn't get in to your wire.
I kinda posted on this post just to keep it updated. Hoping someone would have a better solution. I don't like the way I have mine. But it's worked for several years like that. But I'm always worried about it. And it's just one more thing to worry about especially when your hung up or whatever.
Good luck and someone please help on this subject. Sorry for the pitiful reply of mine. Nthere has got to be a better way than mine out there.