Method for inserting conductive pins from a transfer device to a body of a wound part, each conductive pin being formed of at least one conductive segment and being intended to be electrically connected to at least one other conductive pin via their free end in order to form an electrical winding of a wound part of a rotary electric machine extending around a first axis, the transfer device comprising a spindle body extending around a second axis and a plurality of guide strips radially extending from the spindle body, lateral spaces intended to house at least one conductive segment being defined between two adjacent guide strips, the wound part comprising a cylindrical body of the wound part and a plurality of teeth extending from said body of the wound part so as to define slots between two adjacent teeth, which slots are intended to house at least one conductive segment, the insertion method comprising: - a preparation step, in which the conductive pins are at least partially arranged in the lateral spaces of the spindle body of the transfer device; - a step of positioning the spindle body of the transfer device relative to the body of the wound part so that they are axially positioned one above the other; - a guide step, in which a guide device is arranged to guide the conductive segments of said conductive pins in a circumferential and/or radial direction; the guide step comprising a phase of inserting at least one portion of the guide device between conductive segments in an insertion position, and a smoothing phase, in which the guide device and/or the transfer device is/are axially moved between the insertion position and a guide position, in which said portion of the guide device is arranged closer to the ends of said conductive segments relative to the insertion position, and - a transfer step comprising a transfer phase, in which the conductive segments are inserted into the corresponding slots in an axial direction, and a phase of moving at least one guide strip between an engagement position, in which at least one portion of said strip extends between two conductive segments, and a disengagement position, in which said at least one portion of the strip extends at a distance from said two conductive segments. - a preparation step, in which the conductive pins are at least partially arranged in the lateral spaces of the spindle body of the transfer device; - a step of positioning the spindle body of the transfer device relative to the body of the wound part so that they are axially positioned one above the other; - a guide step, in which a guide device is arranged to guide the conductive segments of said conductive pins in a circumferential and/or radial direction; the guide step comprising a phase of inserting at least one portion of the guide device between conductive segments in an insertion position, and a smoothing phase, in which the guide device and/or the transfer device is/are axially moved between the insertion position and a guide position, in which said portion of the guide device is arranged closer to the ends of said conductive segments relative to the insertion position, and - a transfer step comprising a transfer phase, in which the conductive segments are inserted into the corresponding slots in an axial direction, and a phase of moving at least one guide strip between an engagement position, in which at least one portion of said strip extends between two conductive segments, and a disengagement position, in which said at least one portion of the strip extends at a distance from said two conductive segments.