create-ive way to get chain conveyors coming in and out of a building

(excuse the pun from the title but i couldn't resist)

hey, i'm looking for inspiration : i have 2 factories communicating between them with a conveyor network, and a house in which i have a "create" workshop with its own internal chain network. I want to connect that network from the ones of the factory coming from the outside, but i'm not a fan of just digging a hole in the wall to have the chains and packages go through, even more with ambiant sounds mods that really put the emphasis on the wind and draft coming in.

I was wondering if some of you have some examples and creative ways to hide the hole, I haven't experimented with too many blocs yet so I don't know what can act as a wall but let packages go through.

Thanks in advance for your advices.