diff --git a/docs/manual/03_developer/04_ecs.md b/docs/manual/03_developer/04_ecs/00_intro.md
similarity index 100%
rename from docs/manual/03_developer/04_ecs.md
rename to docs/manual/03_developer/04_ecs/00_intro.md
diff --git a/docs/manual/03_developer/04_ecs/_category_.json b/docs/manual/03_developer/04_ecs/_category_.json
new file mode 100644
index 000000000000..4aa589f12ff5
--- /dev/null
+++ b/docs/manual/03_developer/04_ecs/_category_.json
@@ -0,0 +1,8 @@
+{
+  "label": "Testing",
+  "position": 04,
+  "link": {
+    "type": "doc",
+    "id": "manual/developer/ecs/intro"
+  }
+}