Move the .scs mod file into your ETS2 mod folder (typically Documents\Euro Truck Simulator 2\mod ).
While the mod can be used to purchase the trailers in Singleplayer, triple trailers are often incompatible with TruckersMP (online) due to server-side rules or physics limitations. Installation & Use Instructions KRONE DOBLE & TRIPLE MP-SP 1.37
Two trailers connected via a dolly or central axle, providing increased cargo capacity. Move the
Designed specifically for ETS2 version 1.37.x . KRONE DOBLE & TRIPLE MP-SP 1.37
Krone Doble & Triple MP-SP (1.37.x) | Euro Truck Simulator 2
It bypasses standard game limitations to allow the purchase and use of Double and Triple Krone trailers.
Choose the new or Triple chassis options enabled by the mod.