I have successfully flashed my sonoff 4ch R2 over air without using FTDI adaptor. Can anyone please tell me which 2 points out of the 4 on my sonoff push button has to be connected to the rocker switch if I want to connect it to physical switch to be in sync. I understand that I'll need to change the switchmode to 3 or 4 as well on tasmota. But I'm really struggling with the connection points which I need to use with my physical switch. Any help will be highly appreciated.