In Euro Truck Simulator 2 it's easy to install different mods.
Mods in ETS2 can bring to you new trucks, new trailers, interiors of your truck, new sounds for your engine, new wheels, rears, tuning
parts or even maps, etc.
To install mods just follow these steps:
Download the mod you want
If necessary, extract it!
Paste the .scs file(s) into your Documents/Euro Truck Simulator 2/mod
Create or edit existing profile by clicking on the link Mod Manager
Enable mod(s) you want to use or disable mod(s) you don't want to use