heres the diagram
so at the bottom you want to put -x---x-
at the very top you want to put---x---
at the third row you want to put x-----x
and it should work if you dont understand then tell me so i will try to make it more specific
the results of how it would look like:
---x---
x-----x
-x----x-
tip:you might wanna count the buttons and count the - as well to get the better understanding