The AM1004P module enables the Behringer 1004 module to be transformed from a T (toggle) version into a P (potentiometer version). A small daughter board is attached to the rear of the Behringer 1004, and five small wires soldered to the individual waveform outputs. They attach to the middle of each toggle switch, on the rear of the PCB. The daughter board accurately attaches to the rear PCB using 5mm stand-offs and the original Behringer M3 screws.