diff --git a/README.md b/README.md
index 09878623..c7f6713d 100644
--- a/README.md
+++ b/README.md
@@ -88,16 +88,14 @@ If your Intercom is connected in 2-wire mode you need to use a USB-C Power Suppl
 
 ### Steps:
 #### 2-Wire Mode
-1. Open the wall-mounted phone in your flat
-2. Check which of the a and b Terminals is Ground and which is +24V Bus
-3. Connect the 24V Bus Line to the A Terminal of your Doorman
+1. Open the intercom enclosure in your flat
+2. Connect the 24V Bus Line to the A Terminal of your Doorman
 3. Connect the Ground Line to the B Terminal of your Doorman
 4. Connect an external Power Supply via USB-C Port or P (+5V to +24V) and B (Ground) Screw Terminals of your Doorman
 
 #### 3-Wire Mode with sufficient Intercom Power Supply (min. 100mA)
-1. Open the wall-mounted phone in your flat
-2. Check which of the a and b Terminals is Ground and which is +24V Bus
-3. Connect the 24V Bus Line to the A Terminal of your Doorman
+1. Open the intercom enclosure in your flat
+2. Connect the 24V Bus Line to the A Terminal of your Doorman
 3. Connect the Ground Line to the B Terminal of your Doorman
 4. Connect the P Line to the P Terminal of your Doorman