diff --git a/Models/DepartmentMapper.php b/Models/DepartmentMapper.php
index 0790d87..2f6ca5c 100644
--- a/Models/DepartmentMapper.php
+++ b/Models/DepartmentMapper.php
@@ -34,6 +34,13 @@ class DepartmentMapper extends DataMapperAbstract
         'organization_department_unit'        => ['name' => 'organization_department_unit', 'type' => 'int', 'internal' => 'unit'],
     ];
 
+    protected static $belongsTo = [
+        'account' => [
+            'mapper'         => UnitMapper::class,
+            'dest'            => 'organization_department_unit',
+        ],
+    ];
+
     /**
      * Primary table.
      *
diff --git a/Models/PositionMapper.php b/Models/PositionMapper.php
index 9b441c3..989a391 100644
--- a/Models/PositionMapper.php
+++ b/Models/PositionMapper.php
@@ -34,6 +34,13 @@ class PositionMapper extends DataMapperAbstract
         'organization_position_status'      => ['name' => 'organization_position_status', 'type' => 'int', 'internal' => 'status'],
     ];
 
+    protected static $belongsTo = [
+        'account' => [
+            'mapper'         => PositionMapper::class,
+            'dest'            => 'organization_position_parent',
+        ],
+    ];
+
     /**
      * Primary table.
      *
diff --git a/Models/UnitMapper.php b/Models/UnitMapper.php
index df38f35..485b408 100644
--- a/Models/UnitMapper.php
+++ b/Models/UnitMapper.php
@@ -33,6 +33,13 @@ class UnitMapper extends DataMapperAbstract
         'organization_unit_status'      => ['name' => 'organization_unit_status', 'type' => 'int', 'internal' => 'status'],
     ];
 
+    protected static $belongsTo = [
+        'account' => [
+            'mapper'         => UnitMapper::class,
+            'dest'            => 'organization_uni_parent',
+        ],
+    ];
+
     /**
      * Primary table.
      *