The Defiant MkII was equipped occasionally (or at least tested with) the AI MkVI radar. This has a single pilot scope mounted on the top of the instrument panel. I'm not sure which side, but I think on the right. I've attached an extract from...
OK, a little advertising on an upcoming Aviation Culture Conference between 25-28 March, 2021.
There will be relevant RAAF Centenary and Pacific War coverage; but also articles and discussions on supersonic air transports, WW2 Tempest archiology (Hawker Tempest that is), and much more.
This...
The Osprey Aces volume mentioned by @Greyman, above is a good quick coverage.
If you want more details, try "The Douglas A-20 Havoc - The Ultimate Look" by William Wolf (Schiffer Military History). Part 2/Chapter 2 is the DB, Havoc and Boston in British Service with details of the night...
Try the book "Mohawks over Burma" by Gerry Beauchamp. It covers the entire operations of the two RAF Mohawk squadrons over Burma.
Sample page from Amazon:
View: https://www.amazon.com/Mohawks-over-Burma-Gerry-Beauchamp/dp/0920002188
Likely to be available elsewhere too.
...geoff