Fahrzeug.xml:

<attacherJoints>
       	 <attacherJoint node="0>0" jointType="trailerLow" lowerRotLimit="10 70 50" upperRotationOffset="0" allowsJointLimitMovement="false" canTurnOnImplement="false" comboTime="1">
            	<schema position="1 0" rotation="0" invertX="false"/>
 	</attacherJoint>
</attacherJoints>
	
<connectionHoses>
	<target attacherJointIndices="1" type="electric" node="0>0" socket="electric"/>
</connectionHoses>