Dash support bars

I have been a bit confused about the fitting of the under dash ally plates. Basically, the forward bar can be tapped to allow screw fixings. However, I'm lead to believe the bar supporting the dash just sandwiches the plate between the bar and the dash. I wanted to be able to screw everything down. So I asked a friends dad to stamp me out some brackets, Waited 3 weeks for a place I work for to tell me that they still don't have a replacement part for their welder...
Got in touch with Chedz / Graham from the cobra club who is close by to help me out with his welder. Hey presto. Perfect.