diff --git a/stock_helper/models/stock_location.py b/stock_helper/models/stock_location.py
index cad6d288c..1a1d813a1 100644
--- a/stock_helper/models/stock_location.py
+++ b/stock_helper/models/stock_location.py
@@ -1,4 +1,5 @@
 # Copyright 2020-2021 Camptocamp SA (http://www.camptocamp.com)
+# Copyright 2022-2023 Michael Tietz (MT Software) <mtietz@mt-software.de>
 # License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
 
 from odoo import models
@@ -18,3 +19,20 @@ class StockLocation(models.Model):
         # Efficient way to verify that the current location is
         # below one of the other location without using SQL.
         return func(self.parent_path.startswith(other.parent_path) for other in others)
+
+    def _get_source_location_from_route(self, route, procure_method):
+        self.ensure_one()
+        route.ensure_one()
+        values = {
+            "route_ids": route,
+        }
+        current_location = self
+        while current_location:
+            rule = self.env["procurement.group"]._get_rule(
+                self.env["product.product"], current_location, values
+            )
+            if not rule:
+                return self.browse()
+            if rule.procure_method == procure_method:
+                return rule.location_src_id
+            current_location = rule.location_src_id
diff --git a/stock_helper/tests/__init__.py b/stock_helper/tests/__init__.py
index e67580e62..be6a115be 100644
--- a/stock_helper/tests/__init__.py
+++ b/stock_helper/tests/__init__.py
@@ -1 +1,2 @@
 from . import test_location_is_sublocation_of
+from . import test_location_source_from_route
diff --git a/stock_helper/tests/test_location_source_from_route.py b/stock_helper/tests/test_location_source_from_route.py
new file mode 100644
index 000000000..e3405e415
--- /dev/null
+++ b/stock_helper/tests/test_location_source_from_route.py
@@ -0,0 +1,40 @@
+# Copyright 2022 Michael Tietz (MT Software) <mtietz@mt-software.de>
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+
+
+from .common import StockHelperCommonCase
+
+
+class TestStockLocationSoruceFromRoute(StockHelperCommonCase):
+    def test_get_source_location_from_route(self):
+        self.wh.delivery_steps = "pick_pack_ship"
+        route = self.wh.delivery_route_id
+
+        location = self.env.ref("stock.stock_location_customers")
+        source_location = location._get_source_location_from_route(
+            route, "make_to_stock"
+        )
+        self.assertEqual(source_location, self.wh.lot_stock_id)
+
+        source_location = location._get_source_location_from_route(
+            route, "make_to_order"
+        )
+        self.assertEqual(source_location, self.wh.wh_output_stock_loc_id)
+
+        location = source_location
+        source_location = location._get_source_location_from_route(
+            route, "make_to_order"
+        )
+        self.assertEqual(source_location, self.wh.wh_pack_stock_loc_id)
+
+        location = source_location
+        source_location = location._get_source_location_from_route(
+            route, "make_to_stock"
+        )
+        self.assertEqual(source_location, self.wh.lot_stock_id)
+
+        location = source_location
+        source_location = location._get_source_location_from_route(
+            route, "make_to_stock"
+        )
+        self.assertFalse(source_location)