A stylet-lead assembly comprising: a therapy delivery element comprising a proximal end with a plurality of electrical contacts adapted to electrically couple with an implantable pulse generator, a distal end with a plurality of electrodes electrically coupled to the electrical contacts, and a lumen having a lumen length extending from the proximal end to almost the distal end; a stylet wire having a proximal end and a distal end; a locking insert (92, 122) having a first channel (96, 126) adapted to receive the proximal end of the stylet wire, wherein a portion of the stylet wire extending beyond a proximal end of the locking insert includes at least one bend; and a stylet handle (90, 120), wherein the stylet handle has an opening at a distal end, or wherein the stylet handle has a handle lumen extending from a distal end to an opening at a proximal end, the proximal end of the stylet wire extending through the handle lumen with the bend located in the opening, the opening (105, 140) is adapted to compressively engage the proximal end of the stylet wire to the locking insert (92, 122), such that an exposed portion of the stylet wire measured from the distal end of the stylet wire to a distal end of the locking insert (92, 122) generally comprises the lumen length; characterized in that the first channel (96, 126) comprises a pair of arms (106A, 106B; 144A, 144B) adapted to flex inward to compressively engage the proximate end of the stylet wire, said pair of arms (106A, 106B; 144A, 144B) comprise a cross-sectional area greater than a cross-sectional area of the opening (105, 140) in the stylet handle (90, 120). a therapy delivery element comprising a proximal end with a plurality of electrical contacts adapted to electrically couple with an implantable pulse generator, a distal end with a plurality of electrodes electrically coupled to the electrical contacts, and a lumen having a lumen length extending from the proximal end to almost the distal end; a stylet wire having a proximal end and a distal end; a locking insert (92, 122) having a first channel (96, 126) adapted to receive the proximal end of the stylet wire, wherein a portion of the stylet wire extending beyond a proximal end of the locking insert includes at least one bend; and a stylet handle (90, 120), wherein the stylet handle has an opening at a distal end, or wherein the stylet handle has a handle lumen extending from a distal end to an opening at a proximal end, the proximal end of the stylet wire extending through the handle lumen with the bend located in the opening, the opening (105, 140) is adapted to compressively engage the proximal end of the stylet wire to the locking insert (92, 122), such that an exposed portion of the stylet wire measured from the distal end of the stylet wire to a distal end of the locking insert (92, 122) generally comprises the lumen length; characterized in that the first channel (96, 126) comprises a pair of arms (106A, 106B; 144A, 144B) adapted to flex inward to compressively engage the proximate end of the stylet wire, said pair of arms (106A, 106B; 144A, 144B) comprise a cross-sectional area greater than a cross-sectional area of the opening (105, 140) in the stylet handle (90, 120).