Method for manufacturing electrical connection assembly

A method for manufacturing an electrical connection assembly with a wiring material including conductors and a connector including terminals respectively corresponding to the conductors and an insulating housing for collectively holding the terminals, the conductors being respectively conductively connected to the terminals while being arranged in an array direction perpendicular to a longitudinal direction of the conductors, the method comprising:

• a connector preparing step of preparing a connector, in which each of the terminals has a conductor connection surface exposed outside the insulating housing from a surface of the insulating housing and the insulating housing holds the terminals such that the conductor connection surfaces are arranged in the array direction at intervals corresponding to intervals of the conductors in the array direction;
• a connecting step of electrically connecting parts of the conductors of the wiring material located between holding positions separated from each other in a longitudinal direction of the wiring material and the conductor connection surfaces corresponding thereto by bringing the parts of the conductors and the conductor connection surfaces into contact with each other while applying tension to the wiring material by holding the wiring material at the holding positions with the plurality of conductors arrayed at intervals from each other in the array direction;
• and
• a cutting step of sandwiching the wiring material in a cutting direction perpendicular to each of the longitudinal direction of the wiring material and the array direction and cutting the wiring material by two cutting tools at a cutting position between one of the holding positions and the parts to be connected with the wiring material kept held after completion of the connecting step.