How to install Orfeo Toolbox in SNAP 6.0?

I downloaded Orfeo OTB 6.2.0 for windows 64 bit Zip file, and I tried to install it from ‘Tool/Manage External Tools’ menu, then I selected one of the exclamation marked items , e.g. pansharpening-bayes ,and clicked the edit button to configure this plugin. I selected to install from the local (downloaded) zip file, then clicked the ‘Bundled binaries’, but I received an error message ‘Bundle installation failed ,see application log for details’.
Can anyone guide me for the correct procedure of installing OTB?

is it an option to add them manually as described here?