.dll Mods:

• Place the mod .dll and .ini file (if present) into [ETS2/ATS Game Folder]\bin\win_x64\plugins\
• .ini files (if present) contain mod configuration that can be adjusted as you want

.scs Mods:

• Place the mod .scs file into: Documents\Euro Truck Simulator 2\mod\ or Documents\American Truck Simulator\mod\