How do you think the UI allows you to change the attribute of a single station? It reads the current status (/jn), changes a bit of it, and sets it back (/cs). That’s how the UI does it. Rudimentary programming exercise. At the minimum, perhaps you can Google about “how to set a bit in an integer”? This is really basic programming stuff. If you insist on writing your own script to do it, then I would assume you have sufficient programming skills to implement this.
If you want to add the capability of changing a single attribute at a time, why not just change the firmware and add that feature. The source code is completely open, you can modify it any way you want.