I probably wasn't clear enough becuase I agree with you.
All T50s have bellhousings that bolt to the gearbox.
If, however, the gerabox in question is a rare (to aust) A-series K50 gearbox then the bellhousing wont be bolt on. It will be integral to the gearbox.
Its a fast way to tell the difference between two of the popular cable clutch gearbox options for RWD 4ag engine
I took a guess that the mystery gearbox was bolted to a 4ag but may have got ahead of myself there.