I couldn't start the laptop, so I had to fix it.
It went perfectly, I've received the parts in just five days, by regular mail. Considering that I live in Spain. That was very fast.
Just be very careful with the Mackbook Upper case and it should go fine, and that in the other end of the cable(the one closer to the keyword, not the closer one to main board), you have to lift a small plastic that retains the cable. In stead of just pulling the cable out.