Abstract: There is disclosed a method and apparatus for fixing a predetermined spacial orientation of exposed end portions of plurality of optical fibers included within a conductor unit; extending such exposed end portions between two terminal blocks for maintaining an axial tension therein; and scratching a surface of each of such end portions held in tension in a common transverse plane for causing each of such end portions to break and form a new end face. After such breaking, the spacial orientation of the remaining exposed end portions of the optical fibers is continued during the individual welding thereto of aligned end faces of a plurality of optical fibers of a second conductor unit.