I would try to avoid adding something like that in SatNOGS DB, the main reason is that it will confuse the users of DB (SatNOGS Network users and users of 3rd party apps/software that use SatNOGS DB as source).
Alternatively I suggest two other solutions:
Add the station in testing mode and use the current satellites from DB and schedule observations. This way you will be able to test your setup.
If you want to schedule automatically I suggest using auto-scheduler with a prio file in prio only mode with these test transmitters. Although I’m not sure it works on geostationary.
It should work in the standard “future passes” tab on the station dashboard.
Going outside the current framework should not be necessary or very desirable.
You can of course also run the flowgraphs manually and specify whatever you want them to do.