Drive Shaft Adapter fitment question

[Rotopod]

When I went to mount the driveshaft adapter, I noticed that it does not seem to fit properly with the differential.

Attachment 105776

The diameter of the gold adapter plate is too big to fit inside of the flange of the differential input shaft.
Attachment 105814

Attachment 105775

Attachment 105815

The manual states:
"**There are two different Driveshaft adapters, one for center sections from automatic cars which is coated clear zinc.
The Driveshaft adapter for center sections from manual cars is coated yellow zinc."

Strangely the Silver/Clear coated adapter plate fits, but the Gold/Yellow does not fit.

I guess it might be possible that one of the flanges was finished in the wrong color. But not both...
What am I missing?

I cant see any reason not to use the Silver Adapter.