A system for delivering signals between a pulse generator and tissue includes a lead having a lead body and one or more lead electrodes at a distal end of the lead body. The one or more electrodes are electrically connectable to the pulse generator at a proximal end of the lead body via one or more conductors extending through the lead body. A converter, which is removably securable to the distal end of the lead body, includes one or more converter electrodes. Each converter electrode is connected to an electrical contact that is arranged on the converter to electrically connect the converter electrode to at least one of the one or more lead electrodes.