The station was most definitely the command centre for the occupation, with Dukat in *overall* control 

> 2346
>
> The Cardassians construct space station Terok Nor in orbit of Bajor. It becomes **the seat of the Occupation** under Gul S.G. Dukat.
>
> <Sub><sup>[DS9: Pocket Books: Avatar][1]</Sub></sup>

That being said, while there's no good indication that there was another large command centre other than Terok Nor, there were most certainly *separate Cardassian facilities* on the planet including [weapons yards][2], [spaceports][3], [strip mines][4], [labour camps][5], etc, *each with their own commanders and staff*. It would appear that these operated more or less independently, with Dukat ignoring individual actions as long as productivity was maintained.

It's possible that after 50+ years of occupation, the prefecture runs so smoothly that a large command staff isn't needed since everyone knows what they should be doing, most of the time. Dukat only needs to step in when he suddenly finds that the ten weekly shipments of Uridium Ore from Rakantha Province has dropped to five.


  [1]: https://memory-alpha.fandom.com/wiki/Star_Trek:_Deep_Space_Nine_-_Avatar
  [2]: https://memory-alpha.fandom.com/wiki/Pirak
  [3]: https://memory-alpha.fandom.com/wiki/Spaceport
  [4]: https://memory-alpha.fandom.com/wiki/Mining
  [5]: https://memory-alpha.fandom.com/wiki/Labor_camp