How can I run the "mapviewer" example with OpenSSL installed from the Qt installer

I install qt 5.13.0 RC3 and select the MinGW 7.3 runtimes and OpenSSL 1.1c. When I build and run "mapviewer" example, it is not showing any mapdata because of lack of openssl. My openssl path is

C:\Qt-5_13_0_RC3\Tools\OpenSSL\Win_x64\lib

I have changed the build and runtime environment several times to add the path to variables like LIB, LIBS, LIBPATH, LIBRARY_PATH, LD_LIBRARY_PATH as suggested from various google results.

• How can I make it work?
• Can we make it less complicated? For example if we install OpenSSL from a 3rd party installer, it usually goes into system lib directory and "just works". Even if we don't want to do that, it would be much more straightforward to print a "hint" to the user prompting him to install an external (and better) openssl distribution than ours.