File Manager Guide:
Stop your server.
Open your Game Panel, go to the File manager and browse to File Manager > \content\tracks\
Once in this location create a new folder and name it the exact name of the track folder you have downloaded.
Go into this new folder you created, and Create a new folder called Data
Open the Data folder and upload your surfaces.ini from the track you downloaded. Your map should now be installed.
Start server.
FTP Guide:
Here are our guides on basic FTP use.
What is FTP: https://streamline-servers.com/billing/knowledgebase/5/What-is-FTP.html
How to Access FTP: https://streamline-servers.com/billing/knowledgebase/29/TCAdmin-FTP.html
Stop your server.
Open your FTP program and login to the server.
Browse to the \content\tracksdirectory.
Find track mod folder that you wish to use on the server, and upload it to this directory.
Start server.