hi
the firsts 4 pin are the GND and the other pins are for buttons... pins from 5 to 10 can be connected to pin1, pin2, pin3, and pin4...
ex.
pin5 to pin1
pin6 to pin1
pin7 to pin1
pin8 to pin1
pin9 to pin1
pin10 to pin1
pin5 to pin2
pin6 to pin2
pin7 to pin2
pin8 to pin2
pin9 to pin2
pin10 to pin2
pratically in the pin 5 you can connect 4 buttons and these buttons need to be connected to the first 4 pins... (button1 pin5 & pin1, button2 pin5 & pin2, button3 pin5 & pin4, button5 pin6 & pin1)
the same thing can be done for the other pins (6to10)