how to make Mac use latest openssl instead of /System/Library/OpenSSL
Determine where the binary file openssl is located.

find /usr/local -name 'openssl*' -exec ls -lFd {} + 


The binary file should have /bin/openssl* at the end of the absolute path. Also open a Finder window to view the file system in the GUI with the command 

open /usr/local


Remove any symbolic links that you have created so far then make a new symbolic link to /usr/local/bin/openssl.

This thread also has helpful details on openssl options and managing your path to select an alternate version.