When the main magnet (1) is at the end of the frame and cannot guide your wire ?(or wire (3) ) out of the frame
you can use wire (5) (magnet+exit guide wire) into the frame and guide wire ?(or wire(3))out of frame.
Note: when using the(5) as a guide, please lay down the(1) first, because (1) and (5) are both positive pole and mutually exclusive