This is a magical thing, better than the game's interface, astronauts can freely shuttle in the cabin. If you master the docking method, it may be simpler than the docking interface.
Method of use:
Docking: First open the activation group 3 Start the docking system, then slowly insert it into the cone mouth, fix it, rotate and lock it, and the docking is completed.
Open:Take the pole back, and Open Activation Group 5 and 6 It's done, and then the astronauts can go in.
Undocking: Find the locked structure, detach it,And then slowly leave.
There may be some mistakes in the above article, because I am not good at English, thank you for your support.