The terminals of the BTWI line allow direct connection of different cables without requiring any tools - from flexible cables with crimped terminal to rigid bare wires.

The special shape of the terminal spring allows the safe fitting of the conductors. The contact spring opens automatically during the insertion of the conductor and ensures the necessary force to press the conductor against the current conducting bar. The structure of the spring body also ensures the progressive locking and anti-vibration of the conductor. The opening of the spring to release the conductor is performed by the driver, using a common tool with a screwdriver tip.