This is a special 3-way, DPDT type switch used for switching between the 3 speeds of a rotary effect: SLOW - STOP - FAST. It's commonly known as an "half-moon" switch, even though this one is more like a trapezoid. Built in solid black coated metal, it comes with a TRS jack cable that connects directly to the MOJO. It can be attached to the organ and positioned using the supplied screws.
NOTE: Crumar & GSi Halfmoon Switches are model specific and are not interchangeable.