We cut cable for different lengths of these cables will lie inside the carpet so that the allies including soft soft reach to connect each of the piano keys.
The lengths are as follows:
60cm aprox., For two country keys.
40cm approx. for the other keys 20 cm approx. for the third keys
(with these measures left soft soft with an even distance).
When we have worn, we scrub them about 1 cm from each edge and make a small hole in the conductive fabric. To connect the cable to it and not disconnect, remove the cable through this hole and turn the cable so that it sits firmly in the picture.