Hello Hans,
You should have, one choking plate on the dash board, one coolant drainage plate on the steering collum support bracket, and the smaller chassis plate on the bulkhead. For the coolant drainage and the choking plate either black or white is ok, there was no particular order to the colour just some were black and some were white.
This is the early dash in my truck, but the choking plate is in the same place on later trucks, sometimes in the middle, or the other side above the choke, but always at the top.
The drainage plate on the steering collum
Where the red plate is in this truck, the chassis plate should be. The plate below it is the lubrication plate, my next project once i have sold a few of these.
Have a look and see if you can find the holes.
Hope that helps
John