Place the retro ring in the hole you just cut and make sure it s still level.
Home run in wall panel.
At this point you can run your cables through the wall.
Structured wiring begins with a structured networking panel snp which accepts cables from outside providers and distributes the signals directly to each room in your home.
Put it in now preferably during build stage so low voltage conduit can be run in the walls to each media outlet location and easily replace the media wiring and or related central distribution components as technology changes run cat5e now but when you need fiber run several years down the road it s very easy to do with smc infrastructure in place.
Try to detect which way joists run and where empty wall space between studs might be.
If you re going just a few feet from a wall mounted tv to a lower entertainment center for example it should be easy to fish the wire down.
Always inspect as much as possible before making a hole.
By inspecting from your crawlspace or attic you can identify which wall locations do not carry water pipes and electrical wires.
The main component in a home run wiring scheme is the central distribution point which depending on the type and size of network can be a router hub or structured network panel snp.