These are looking very promising. I want to offer some suggestions if I may? I actually am a USCG licensed Captain and have been to many a dry-dock and regular maintenance dock in my work.
1) This is not a "Dry-Dock." Dry-docking is when a ship is taken out of the water completely and placed on land. This allows work on the underside of the hull and also allows for complicated inspections to take place that will keep the vessel registered, like some of you must get emissions tests on cars, ships and boats who are for hire or inspected as training/military/commercial must undergo regular, rigorous inspection by either the military or USCG inspectors. This happens once a year, with major inspections due every 5 which include running drills and simulations with the crew for the inspectors to pass off crew as being proficient enough to run the vessel.
The equivalent of a dry-dock for a ship would be an entirely enclosed, gravity-enhanced facility that is climate controlled and that would ground the ship by hard, semi-permanent attach points to the inside of the facility.
Instead, you would consider this a "hard-dock." Or just a regular dock, in general, as most all docks for ships have even rudimentary ability to be service facilities.
2) You need more connections and the girders need to be closer to the ship. The girderrs I've seen in your Screens look too far away from the hull to allow a human team of engineers or welders to benefit from them being there. I imagine that most any worker would be suited in an exo-suite of some kind, and thus the only purpose of the girders in deep space would be to allow heavier equipment to be handy, as well as tethering the workers to the station for safety. Also it could be used to help brace and position difficult repair jobs and equipment. You would constantly have traffic on and off the ship.
3) You also need a support center. Girders around a ship with just a small dock at another end with no structure to support materials, housing, utilities such as fuel and gas, and auxilliary machinery that the ship may need is pointless. If the ship were going to do repairs on it's own self without going to a very lively, stocked and supported facility, it would just do them in it's own little piece of space without bothering about the girders. The crew would tether to the ship, and repairs would be made sufficient enough to make the nearest hard-dock.
4) If you want to include some sort of scaffolding support, ie - heavy damage to the ship requires the crew to build scaffolding on to the exterior in order to repair the ship to make minimal way, the scaffolding would be small and localized, and physically attached to the ship. A Fenris cruiser, I doubt, would have the spare cargo room to hold girders the length and scale of what you screened. The scaffolding they would have would be for when it was only absolutely necessary, or when there would be long portions of time away from any hard dock facility where repairs to exterior mechanics could take place. If you've never been aboard any commercial or military ship, they are equipped with scaffolding and maintenance supplies. Some even have cranes mounted in stowed positions that can be spot welded into place should the need arise. However in doing so, they give up a very big majority of stowage space and typically those that have such equipment haul cargo and do scientific missions. Warships have very little space for large scaffolding or repair equipment, relying on support ships for this. The turrets, crew quarters, life support and engine systems take up more room than can be spared, and most quarters aboard are tight, sparse. The BattleStar Galactica series was a bad example of interior ship design. They showed large hallways, spacious quarters and many vacant, unused rooms. A true warship has no space for heavy repair machinery that does not have some dual purpose for war. Everything on a ship has a dual purpose. Right down to the seats. No wasted space.
I really like where you want to go with the idea of manipulative scaffolding. Don't get lost in the "cool" factor though. Keep it realistic and functional.