MacBook Air 2015 Registeres left click as right

Hi! I have two MacBook Air 13” 2015 models. Both’s keybord got water damage. If i click left on a trackpad, it registeres as right. It is the same with an external usb mouse. Even if i open up the laptops and disconnect the trackpad-keyboard cables, it still does this. Can anybody help me? I didn’t find anything relevant on the internet. Thank you!