The skin is made for the BDF Tandem Truck Pack by Flemming Vinge so you will need to download his mod first ( https://forum.scssoft.com/viewtopic.php?t=126098 ). Has included all of his trailer types, all you need to do is put this mod above that mod.
Credits:
Flemming. V. tyb33rk (aka Vandall RTR)
DOWNLOAD 151 MB
I have a question do you make for me this this pack trailer pack save game crash do you know that for us make this pack is also ets.lt the trailer pack is called-ekeri_tandem_addon_by_kast .zip