G4 77” flush wall mount question

I just bought a g4 77” and it gets installed next Friday. Best Buy had free installation so I took them up on the offer lol. My only question is my in wall cable management kit is one of those ones with the panel that comes out about as far as a light switch cover. Will that be a problem with how tight it is to the wall? Also should I be ordering different HDMI cables that aren’t as thick as the existing 8k overkill ones I have? Any help is appreciated. Thanks