Engineering high quality marine electrical components for safety, reliability and performance
Take a look at the 3rd picture on the Blue Star site above. I believe if you have a complex build with a lot of electronic gizmos Bennington may require the power distribution block to affix all of the electrical connections, fuses and switches. If a simpler build then perhaps not needed and could be why it was left off your build. On my build I have dual batteries and the electric power assist steering so I think it was required.
In all honestly I have no idea if this is the case, just a WAG. Might be worth asking the dealer for a picture of what this option is. For $200 it probably will come down to your personal preference on how clean the boat is wired.
Then my initial assumption was incorrect - but I ran a build on the Bennington website and it seemed to imply it was required with the electric power steering (upgrade over hydraulic).
I would still defer to the dealer and have them explain what you are currently scheduled to get (picture preferred) vs. what the upgrade gets you. I can’t imagine that the Bennington forum would be more helpful than the actual selling dealer - if that’s sadly the case, then reach out to Bennington direct. They are very responsive to inquiries.