Just for clarification. The pair of contacts-springs that I mentioned before, are visible on photo of step 21

Hi. On photo 28, those pair of contacts on printed pcb from the home button are going to be connected to a pair of contacts-springs that are near the lightning connector. Where do these contacts-springs are connected to ? I have a case of faulty home button that after replacing the home-button assembly, it is still failing. What could be the cause ? I’ve read that the home button when it fails, 9 out of 10 cases is due to the button itself. My case is 10% remaining. Any idea? Thanks.