diff --git a/HOWTO-GDI-flow-bench-using-rusEFI-GDI4.md b/HOWTO-GDI-flow-bench-using-rusEFI-GDI4.md
index 83fc387a..f548e3ec 100644
--- a/HOWTO-GDI-flow-bench-using-rusEFI-GDI4.md
+++ b/HOWTO-GDI-flow-bench-using-rusEFI-GDI4.md
@@ -2,4 +2,6 @@
 
 PC software https://www.efianalytics.com/TunerStudio/beta/
 
-pinout https://rusefi.com/docs/pinouts/GDI4/
+Documentation https://github.com/rusefi/rusefi/wiki/GDI4
+
+Pinout https://rusefi.com/docs/pinouts/GDI4/