[IDEA] [Tut] How to turn off Backlight of a Waveshare 7" HDMI LCD using GPIO and screensaver

[Fistandantilus]

Hi, I have just registered as I was looking for switching of my backlight as well. Obviously my Display has a new revision (3.1) so the PCB looks a bit different. Maybe you can help me to identify the pin to which I need to solder the cable and the capacitor which should be removed. There are two. The resistor I can see.
From what I see I think it should be the left pin and the left capacitor beside the resistor. Is that correct.
Is it also correct that I just need to solder that 1 cable and gnd is coming over HDMI?

thx F.