Treat those D-Rings as your cable ladder. Mount them vertically in a straight line between the wall plates and the rack.

Make nice bundles of cables. Maybe do all speaker in a bundle all RG6 in a bundle all Cat5 in a bundle etc. Attach the bundles at each D-Ring. The only weight or strain would be the 1' or 2' between the first D-ring and the wall plate. These short whips wont be an issue.

Any reason you aren't using a tall structured cabinet instead of all the wall plates? unused cables could be coiled up at the bottom and a closed door would keep anyone from accidentally unplugging a cable. Cost should be similar once you add up all the plates and jacks.