It is a well known problem that the wires of servos and tranponders become hard and fragile. With the transponder it is no option to open it for resoldering so for me time to fix it .
The transponder gets a holder from double sided PCB:
Cleared one side for a part so it can be glued:
Glued the transponder and cutted and stripped the wires:
Made cuts on the other side to prevent a shortcut, made small wires to connect the bottom and top layer:
Soldered the wires and used some kit to make it fuelproof:
And now you can simply solder a servowire to it with some shrinkwrap and replace it every year.