A stimulation system is described that includes an implantable microstimulator. A tail may be coupled to a distal end of the implantable microstimulator. In one embodiment, the stimulation system includes an implantation tool that includes an insertion cannula, a handle, a bushing, and a detachable blunt dissector tip. The bushing is situated within the insertion cannula and may position the implantable microstimulator longitudinally within the insertion cannula when the implantable microstimulator is placed within the insertion cannula. The detachable blunt dissector tip may be attached to the tail of the implantable microstimulator. The stimulation system may further comprise an end cap that includes an upper portion and a base portion conformable over at least a portion of curved tissue. An open trough extends through the base upper portions and may be configured to guide the implantation tool through the tissue at various angles.