Search for the skin on reputable modding hubs like ETS2World or ETS2Mods.lt .
The is a highly popular, Norse-mythology-themed custom paint job designed by author Hedmark Transport for Euro Truck Simulator 2. It is designed specifically for Eugene's Scania R modification. Scania R Ex Leif Egil Transport MjГёlner Skin
Required if you want the custom roof lightbox to light up with matching company branding. Search for the skin on reputable modding hubs
Double-click it or click the arrow to move it to the active list on the right. Required if you want the custom roof lightbox
If the file downloaded as a .scs file, drop it directly into that folder.
On the profile selection screen, click on the button. Scania R Ex Leif Egil Transport Mjöllner Skin in your inactive list on the left.
Find and select the "Leif Egil Transport Mjöllner" paint scheme from the list.