Issue setting environment variable that points to smb Can someone tell me the proper syntax for setting an environment variable that points to a smb volume directory?

What I have tried so far:

TNS_ADMIN=/Volumes/abc
TNS_ADMIN=smb://servername/abc
TNS_ADMIN=/servername/abc


Additional info, I have Oracle InstantClient installed and I'm trying to use SQLPlus. Except, the connection file I need is located in the shared directory located in the aforementioned smb volume.  I'm trying to set the environment variable (TNS_ADMIN) such that it points Oracle to look at the smb volume, where the file is located.  Nothing appears to work.  Looking for guidance on what the proper syntax should be on setting an environment variable that points to a smb volume.  Hope that makes sense.
Open Terminal
Open Finder and navigate to the folder containing the connection file
Drag&amp;drop tns_names.ora into the Terminal window


The path shown is the value you need.