Medusa cement factory

[Hawkesburytrain]

Hey everyone,

I intend to build the Medusa cement factory, but was wandering what goes in the sliding doors of the silos?
Can it be cement trucks? Not sure because it's right in the silos, could it be just ordinary trucks picking up powdered cement?

I've done a picture search and nobody as anything that could direct me in the right direction

Thanks for your help

 

[Rico]

Bulk tractor trailers load under the silos.
There's hopper bottoms and gates, the powder goes thru scales under them usually.