Add it to your server
In your server's .ini file (servertest.ini by default), add these to the existing WorkshopItems= and Mods= lines, separated by a semicolon (;).
WorkshopItems=3828379834
Mods=ThisCarIsMine
| Workshop item | Subscribers | Declared in |
|---|---|---|
| This car is mine [B42]3828379834 | 18 | description footer |