Details & Changes.

Instrument panel.

Instrument panel from 20-0001 until 20-041711.
Note the curve for the steering column, and the "big" hole for the
starter button, and the two holes for the fuse boxes

 Instrument panel from 20-041712 until 20-069408.
Now there is no curve, and a smaller hole for the starter buttom.
 

Instrument panel from 20-069409 until 20-117901.
The same panel, but now there are no holes for fuse boxes.