Abstract: A termination apparatus for electrical connectors, which includes an improved apparatus for applying operating forces from an apparatus operator to rotatable insertion arms, is provided for use in inserting a plurality of insulated conductors into respective insulation piercing contact portions of an electrical connector. The disclosed apparatus includes a frame, a removable support structure for a connector, which aligns the insulated conductors adjacent respective insulation-piercing contact portions of the connector, a pair of oppositely disposed insertion tools that are rotatably mounted on the frame for movement toward and away from each other and that carry insertion tools for inserting the insulated conductors into the connector, and an assembly that more effectively applies and distributes operating forces to the insertion arms during a termination cycle.