The visual control of the crimping of the twinned wires is determined through:• Checking of the positioning of the twinned wires according to the customer's requirements (juxtaposed / superimposed)• checking of the standard of twinned superimposed wires (the smallest section must be below the biggest)• Visual inspection of the penetration of the wire insulation below (superimposed twin wires) in the core portion of the connection by opening the fins on the insulator with a suitable tool, So Checking the appearance of the wire strands underneath (See photos below)