Ok I can inject some input on this topic. I am a Master Electrician in multiple states for over 20 years. I have been in the electrical industry for almost 40 years.
The RIB is designed to be used as the pictures show. The only concern with using the low voltage wires extending through the boxes is the type of insulation on the wires. As long as the insulation on the low voltage wires matches the insulation on the high voltage wires it is perfectly acceptable to pass through the same box. In other words, the low voltage wires should have 600 volt insulation. The high voltage is not that high, but the National Electrical Code states that you must MATCH the HIGHEST RATING of the insulation, not the actual voltage.
Just my 2 cents worth.