Hi Tim,
You need to get the full UNC path or full URL into the tab file field.
Connecting to a file
You need to do things:
1: Place the file (e.g.: PDF) onto your SSA server at C:\Program Files\Pitney Bowes\SpectrumSpatialAnalyst\Tomcat7\AnalystConnect\webapps\connect\Includes
2: Assuming you have gone public facing, you need to enter the path of that file into the tab field (e.g.: https://geo.southwark.gov.uk/connect/analyst/Includes/Listed Buildings/SwarkLB 180.pdf)
Note that I have several folders within the 'Includes' folder relating to different areas of the business. So, the example above has the PDF stored in the ..../Includes/Listed Buildings folder and the value you place into the tab files is ...Includes/Listed Buildings/...
When an object is clicked on in SSA where there is a linked doc it will come up as a hyperlink in left side panel.
Linking to a URL
Just place the full URL into the tab file field including http:// or https:// at the start
When an object is clicked on in SSA where there is a web link it will come up as a hyperlink in left side panel.
Linking to an email address
Place mailto:john.smith@somewhere.com into the the tab file field