A very big well done on your progress to date
You can feel very proud of what you have achieved in such a short space of time.
The Sierra steering wheel should haev been held on the donor car with a yoke plate, silver in colour.
This is the plate that bolts onto the steering wheel support frame on the Roadster.
It is quite easy to discard this when you strip the donor or even worse leave it on the donor.
I'll try and take a photo for you in a moment.
Well done