Swapping Touch Id Flex

Hello I want to ask you something. I have one of my customer's Macbook pro and touch id flex been torn off while I was trying to take it off for keyboard replacement. So what I want to ask what if I find another original button and cut off the flex and do the all ways with the other button will it work again? So the chip which includes the verifation of touch id is it under the button area or on of the chips on flex? do you know and if it is on flex what if I swap those chips too? Do you think it will work anyway?

Thank you