arduino Circuit

I have a coffee machine comes with 12 selections; all of these selections are connected via touch panel from the front of the machine; I need an Arduino code to get the action from the touch panel when the customer pressed any of the touch buttons; I already create a code to do some tricks like rfid then return the result to the coffee machine via the same selection. Summary: I want to simulate the touch panel and get the selected touch button. all other coding already completed. the attached pictures show you the touch panel & the main board of the coffee machine