замените
<attacherJoint index="0>1" jointType="semitrailer"/>
-<trailerAttacherJoints>
<trailerAttacherJoint index="0>15" maxRotLimit="10 80 80" low="false"/>
<trailerAttacherJoint index="0>19|1" maxRotLimit="10 80 80" low="false"/>
</trailerAttacherJoints>
на
<attacherJoint index="0>1" jointType="semitrailer"/>
-<trailerAttacherJoints>
<trailerAttacherJoint index="0>15" maxRotLimit="10 80 80" low="false"/>
<trailerAttacherJoint index="0>19|1" maxRotLimit="10 80 80" low="true"/>
</trailerAttacherJoints>
и будет прицепить в автопоезд обичной siga uno или duo