Sid went to a high rise building, which is his own building where the majority of his business transactions legal and illegal are done secretly. That building has a basement that houses crates and crates of weapons and illegal drugs.
That basement was guarded tightly by his men " terrorists" and no one can approach the said basement entrance except for Sid Devon. Naturally, Sid Devon would sometimes visit the basement to asks his men to bring the crates of weapons or drugs if he has an appointment with prospective buyers. Whenever he comes to visit the basement, the guard would stand watching the door while Sid Devon and his men carried the crates out of the basement for the transaction that will usually occur at night.