When the main magnet (1) is at the end of the frame and cannot guide your wire ②(or wire (3) ) out of the frame
You can insert the wire (5) (magnet + output guide wire) into the frame and guide the wire ②(or the wire (3)) out of the frame.
Note: If you use the wire (5) as a guide, please first put the wire (1) as (1) and (5) are both positive poles and exclude each other.