Some custom cabinets. Here is a link with alot of the info and some pics. https://www.rvusa.com/rv-guide/2017-grand-design-momentum-toy-hauler-floorplan-399th-tr30447
So I have added pics today of the stuff that didn't come on the standard toy hauler.
There is also extra lenght of 50 amp extension cord for the main electrical power coming in.
There is 2 in feed Camco Blue water hose and 1 heated, and  pressure regulator..
Also several black water tank drain hoses and connectors.
This Trailer on the roof I added a 7 in 1 antenna for sending receiving of 2 different cellar plans which ever has the best reception. Also it is your wifi via cell, camp  supplied wifi or hard wire.