this is the keyboard before soldering
The above picture shows a good example of the contacts before soldering. Each of the ‘S’ type shapes was were the metal contact would be pressed down normally to compelete the ciricut and create the sound.
wires have been soldered on to each end of the contact to complete the curicut
The above pictures shows how the board looks after being soldered. A wire was soldered on each side of a respective contact to allow the curicut to be competed when the ends of the wire touch.