The original VF system was two bowls, one pump for at least the first 10 years and worked well as long as both toilets were correctly plumbed. But then SeaLand Technology dropped their requirement that the system had be installed by one of their "certified VF technicians" (I was one) and began allowing boat owners to install it themselves...it wasn't long before they began requiring each toilet to be a completely separate system.
All the "works" are in the pedestal of the Marine Elegance...plumbing consists of running the discharge line to its destination--tank, treatment device or thru-hull. The "Installation, Operation and Maintenance Instructions" (aka owners manual)
Raritan Marine Elegance Owners Manual, which includes a parts list and exploded drawings, should answer a lot of your questions and I'll be glad to help you sort everything out in detail if you'd like to send me a PM. Meanwhile,
My book does not include diagrams of electric macerating toilet multi-systems because every macerating electric toilet is a completely separate stand-alone system. It's not even necessary that all the toilets on a boat with multiple heads be the same make/model or even that they all be electric toilets.
However, I do think you'll find my book useful. Its title (my publisher's idea) is a bit misleading...'cuz although it does deal with every source of odor on a boat and how to cure, or better yet PREVENT 'em, it's actually a comprehensive "marine toilets and sanitation systems 101" manual that explains the laws, describes all the types of systems and how they work.
--Peggie