The ship is the thing docking, not the camera; I think I get the general idea, just not why.
Of course it is, but do you not pilot the ship from one of the camera views? As I said, most likely the cockpit view camera. And do you not need to fly down the docking corridor for a successful docking? (Well... maybe not, but if you don't, then what is the point of the docking corridor in first place?)
Ship A has the docking port at the front, the cockpit camera is above, behind, and maybe a little to the left of the docking port. You can set up the docking corridor for that offset, and from the pilot's perspective, you fly down the middle of the corridor tunnel.
Now, Ship B also has the docking port at the front, but has no cockpit, like the shuttle, and the main camera is on the tail, much further behind and higher than the camera on Ship A, as well as on the center line. Now, from this perspective the docking corridor will not be correctly aligned. If you try to fly down the middle, you will be too low and to the right. And if we had collision detection, we'd also crash.
How do you use the docking corridors?