Copy the contents of that folder and paste them into the main directory where you installed the game, replacing the original files. :
: Downloading paid content for free violates copyright laws and does not support the developers at Milestone. General Installation Guide (Standard Procedure) File: SBK.22.v2022.09.15.Incl.ALL.DLC.zip ...
: Access to multiplayer features which are usually disabled in pirated versions. Steam Workshop : Easy access to community mods and liveries. Copy the contents of that folder and paste
Files with names like SBK.22.v2022.09.15.Incl.ALL.DLC.zip are typically distributed via unofficial third-party sites. Downloading and installing such files carries significant risks: File: SBK.22.v2022.09.15.Incl.ALL.DLC.zip ...