Really- if everything is quiet, and it’s out of sight, leave it alone. I was going to suggest trying to route the wires for neatness while the system was on, so you’d be able to immediately hear a problem, but the old saying applies- ‘if it ain’t broke, don’t fix it’. I’ve moved wires, had issues, moved them back.
I periodically turn the volume way up with no source playing and go through the inputs just to placate myself; we are a little crazy!…
Jim