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Step 3Surgery!
Pry the little tabs up which keep the pushbutton on the main board. They are on the back of the board. The button itself should come off really easily.
Cut the wire leading to the speaker at point A, or you can simply desolder where they join to the PCB.
Locate R3, which is labeled on the board itself. If you can't read the numbers on the board, it's the resistor at the top, if your board is oriented like the picture above. The lead on the inside, point C, is where you will solder one wire. Attatch the other end of that wire to one lug of an SPST toggle switch. Attach another wire between the other lug and either one of the points where the speaker attatches to the board; mine is at point B. This is the loop connection.
Cut the wire leading to the speaker at point A, or you can simply desolder where they join to the PCB.
Locate R3, which is labeled on the board itself. If you can't read the numbers on the board, it's the resistor at the top, if your board is oriented like the picture above. The lead on the inside, point C, is where you will solder one wire. Attatch the other end of that wire to one lug of an SPST toggle switch. Attach another wire between the other lug and either one of the points where the speaker attatches to the board; mine is at point B. This is the loop connection.
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