This publication relates to a coupling device (36) for and a method for connecting coupling device in a tie-in system (10), subjected to pulling forces or tension in any and all directions, comprising a unit in the form of a U-shaped tube thimble (22) to be connected with a closed loop body (34), such as a link, eye or a ring, and where the thimble (22) is connected with a line (13,14, 18), where the tube thimble (22) is rotatably arranged on the curved outer surface of the coupling element (30).. Method for connecting the coupling comprises the steps of - bending the legs (28) of the thimble (22) outwards and inserting the coupling element (30) into the center hole of the thimble, the slot (38) facing towards the end of the legs (28), creating a tight grip when the legs are released, and - threading the slot (38) onto a link or a ring, and - inserting a rope or a wire in through one of the legs (28) of the thimble (22) from the bottom opening to the top, to be bent and threaded in through the top of the other leg from the opposite end and down to the bottom end of the leg, whereupon the rope or wire end is spliced to form a closed loop or thimble eye.
