You’ll need to either edit/open from project, and then load back to project, or save them out to a directory, open via filepath, add parameters, close/save then reload them.
The orchid package can do either route, but the second method is far easier. I have a video showing it here:
As far as I know theyre the simplest approaches short of using project parameters as you identified.
If you want to explore option 1, I shared a script here that shows how it can be achieved using python:
