Many YouTube creators provide direct links to the necessary files in their video descriptions. Follow these general steps found in popular tutorials:

After the first launch, a mod folder should appear in the game's directory within the emulator. Adding Mods: Move your .scs mod files into this folder.

Sufficient space for the game files and the emulator.

While was originally a classic PC trucking simulator released by SCS Software in 2006, it is now possible to play it on Android. Because there is no official mobile version, you must use Windows emulators like Winlator or Box64droid to run the game files on your smartphone. Requirements for Android

How to Download and Play 18 Wheels of Steel: Haulin' on Android via YouTube Tutorials

Start the game with minimum graphics settings first. This allows the game to create necessary system folders (like the mod folder) which might otherwise appear empty on Android. Using Mods on Android

Look for a trusted YouTube tutorial that provides links to the game's .rar or .zip files and the emulator APK.