You present an interesting question Jan! Mine is mounted in my right hip and is readily accessible for recharging and controlling. Depending on your placement and the point where the wires go in, you could have a bit of difficulty both charging and controlling the unit. For instance, mine has paddles placed on my spinal cord in the T8-T9 space due to a laminectomy, and this for the purpose of controlling nerve pain from my lumbar to legs.... and I am quite happy with this arrangement. I charge by placing the charger on my right hip every now and again, and I control by aiming the remote control at my right hip. Importantly, I can see the screen on my remote as I am making adjustments. If it was placed in my mid-back both charging and controlling would be difficult if not impossible, thus the question, where will your wires enter?

Glad you are making forward strides!
Mark56