An external neurostimulator comprising: a housing, wherein the housing includes a base housing including a surface configured to contact a patient's skin, and a top housing including a central portion, a first side door hingedly coupled to a first side of the central portion, and a second side door hingedly coupled to a second side of the central portion, wherein each of the first side door and the second side door include a channel (352A, 352B) formed thereon that is configured to directly receive a proximal end portion of an implantable lead and wherein each channel (352A, 352B) includes a series of longitudinally spaced-apart openings (360A, 360B) formed on the first side door and the second side door, respectively; a power source disposed within the housing; a pulse generator disposed within the housing, wherein the pulse generator is electrically coupled to the power source; and a first series and a second series of spring-loaded pins (362A, 362B) electrically coupled to the pulse generator, wherein the first series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the first side door and the second series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the second side door, and wherein each of the first side door and the second side door has a locked configuration and an unlocked configuration, each of the first side door and the second side door being closed in the locked configuration and each of the first side door and the second side door being partially-opened in the unlocked configuration. a housing, wherein the housing includes a base housing including a surface configured to contact a patient's skin, and a top housing including a central portion, a first side door hingedly coupled to a first side of the central portion, and a second side door hingedly coupled to a second side of the central portion, wherein each of the first side door and the second side door include a channel (352A, 352B) formed thereon that is configured to directly receive a proximal end portion of an implantable lead and wherein each channel (352A, 352B) includes a series of longitudinally spaced-apart openings (360A, 360B) formed on the first side door and the second side door, respectively; a base housing including a surface configured to contact a patient's skin, and a top housing including a central portion, a first side door hingedly coupled to a first side of the central portion, and a second side door hingedly coupled to a second side of the central portion, wherein each of the first side door and the second side door include a channel (352A, 352B) formed thereon that is configured to directly receive a proximal end portion of an implantable lead and wherein each channel (352A, 352B) includes a series of longitudinally spaced-apart openings (360A, 360B) formed on the first side door and the second side door, respectively; a power source disposed within the housing; a pulse generator disposed within the housing, wherein the pulse generator is electrically coupled to the power source; and a first series and a second series of spring-loaded pins (362A, 362B) electrically coupled to the pulse generator, wherein the first series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the first side door and the second series of spring-loaded pins extend through the series of longitudinally spaced-apart openings of the channel on the second side door, and wherein each of the first side door and the second side door has a locked configuration and an unlocked configuration, each of the first side door and the second side door being closed in the locked configuration and each of the first side door and the second side door being partially-opened in the unlocked configuration.