As you don't have proper coordinates you will have to eyeball it.
PS: don't use circles on edge.cuts for defining holes <= 6.35mm - use circular NPTH footprints. Drilling is more accurate than milling. Diameter variations of +/- 1mm are possible otherwise!
I don't see anything that is cut off?
Can you circle an example?
If you can, modify the DXF before importing and make versions for outline / silkscreen / positions of devices.
Then import them and select the appropriate layer in KiCAD during that process.
Afterwards this is possible as well, but takes ages, as you have to select every segment on it's own and select it's layer - very tedious.