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=3797292945;3820760923
Mods=Locksmith;Locksmith Rus
These lines include the mod it requires, as its Steam page declares it:
| Workshop item | Subscribers | Declared in |
|---|---|---|
| Locksmith - Padlocks, Lockpicking, & Re-pinning Rus3820760923 | 10 | description footer |