@lgcebr
There’s no right or wrong way, just a general set of principles you have to follow.
I’m not going to look up your specific kit, as the last time I did that, and saw ARC, it turned out that the device had had a firmware upgrade to eARC, which confounded nearly everything I said.
Principle 1: for the best sound, plug the device into the AVR.
Principle 2: for the best picture, plug the device into the TV.
Principle 3: see what, if any, compromises occur. There may be none.
If the TV has only ARC, principle 1 wins every time.
If the TV has eARC, there may be no compromise on sound at all, connecting to the TV
If the amp is HDCP 2.2, or higher, compliant there may be no compromise on picture at all connecting to the AVR.
if the source is HD, without HDR, you can probably go via the AVR with no picture compromise anyway.
For a concrete example, my UHD BluRay player, plugged into the TV, can’t pass the highest quality sound a UHD disc is capable of over ARC to my soundbar.
But if I plug the UHD player into the soundbar, that can’t pass HDR to the TV, as the soundbar is only HDCP 2.1
And if the UHD player had only one HDMI out, I would be forced to choose which was more important to me, picture or sound?
Though fortunately, it has two HDMI outs, so I can send picture direct to TV, and audio direct to soundbar.
But you can perhaps see from the above why a single connection diagram, or even a couple of alternatives, can’t possibly cover all the eventualities with all the different kit of different specs you might have, and you need to figure out your best options from the principles above.
My favourite bedtime reading is a Sony product manual…
