Ahh thanks. Just as I suspected, simple carbon contact switches. Basically momentary switches, that goes through a logic circuit to turn a function on or off. I'm really surprised that a replacement panel upgrade hasn't been made. Seems our Asian friends could make this for pennies to be sold for dollars here. I don't think there is enough room for a push-button latch on/off behind the blanks. Maybe a small pintle that goes through the board and pushes on a switch mounted on the back of the assembly.
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