vacuum routing for a 58 commercial chassis

[john E renstrom]

we are working on a 58 eureka and up to getting the dash back together. 'should be the same as the standard caddy maybe" we received the car partly disassembled and what was still left was brittle and broken off. so trying to figure out the routing for the vacuum washers. we have the engine, wiper, dash pot figured out with a little help but I can't find anything on the washer.  I'm guessing that the big hose from the log manifold goes to the jar. the wiper switch timer to the jar and the push button inside to the  jar. then the water hose to the ports. does this sound about right?  tried the search and come up  with a 40's  but not the newer stuff.