Place one conductive pad between the L4 and L5 vertebrae offset horizontally towards the side of greater pain. One side of the pad should overlap the midline of the spine as demonstrated in the image below
Place the second pad on the plantar fascia where the discomfort is greatest. Treat for 15 minutes in RSI mode.
Move the first pad from the spine to the ipsilateral (same side) fibular head so center of pad is just distal to the fibular head, over the peroneal nerve.
Leave the second pad on the plantar fascia and treat for 15 minutes on RSI mode.