PURPOSE: To facilitate connection to a bushing even if any error exists in a cable line by mounting a frame for holding the bushing where the end of a cable is connected onto a base provided with a track for guiding it, and fitting a frame positioning means between the base and the frame.

CONSTITUTION: A frame 16 for holding the main body of a bushing 14 where one end of a cable 12 cut to a desired length is connected is placed on a base 20 provided with a track 18 for guiding straight for each bushing 14 provided on it. Between the base 20 and the frame 16, a frame positioning means 60 provided with a bot and nut assembly 62 is mounted. As a result, the bushing 14 can be moved on the track 18 of the base 20, and fixed at an optimum position which facilitates connection work according to the line length of the cable 12, so it is possible to perform assembly easily and promptly.