To measure the capacitance, we need to use resistors. One end of the resistor is the string, and the other end will be connected to our common "send pin", pin 5 on the Bean. Pin 5 will be connected to all of our strings.

Take the four 1M ohm resistors and put them through pin 0-3 on the back of the Bean. Make sure that none of the legs touch the leg of the piezo buzzer. Put the other leg of the resistor through the holes along the border of the Bean.

Flip the Bean so that you have the front forward. The legs that come out on the right side of the perf board all need to be connected to pin 5. Take the bottom leg and bend it so that it goes through pin 5 and touching all the legs on the way. Solder it to pin 5 and to the other resistor's legs.

Cut the legs sticking out on the side of the perf board, but keep the ones coming out of pin 0-3! We need these to connect to the strings.

Illustration made using Fritzing