diff --git a/readme.md b/readme.md
index b43ff1e..3fd9d7f 100644
--- a/readme.md
+++ b/readme.md
@@ -127,6 +127,8 @@ Connection scheme for a typical dual-zone heating system with two heaters and tw
 | 7     | Grelec 2              | Heater 2 – Neutral / Return  | –                           |
 | 8/PE  | Termočlen 2-          | Thermocouple 2 – Negative    | White / Red                 |
 
+![Wiring picture](static/pictures/7_pe.png)
+
 **Notes:**
 
 - Pins 1 & 5 → Heater 1 (usually 230 V AC or 24 V, depending on system)