diff --git a/Variant-PWM.md b/Variant-PWM.md
index e5a6650..0cbc893 100644
--- a/Variant-PWM.md
+++ b/Variant-PWM.md
@@ -1,8 +1,12 @@
 This variant can be used with Pulse Width Modulation RC Receivers.
 
+## Configuration/Parameters
+CONTROL_PWM_RIGHT is for the right sensor cable and is set by default to limit the noise as this cable is shorter.<br>
+You can use CONTROL_PWM_LEFT instead if you need to use the left sensor cable.<br>
+DEBUG_SERIAL will be automatically enabled on the opposite cable.<br>
 
 ## Wiring:
-* Connect channel 1(steering) of your receiver to blue wire and channel 2(speed) to green wire. By default, the right sensor cable(shorter) is used to limit the noise
+* Connect channel 1(steering) of your receiver to blue wire and channel 2(speed) to green wire of the cable selected in config.h
 * PWM is highly prone to noise : keep cables short, use 100nf capacitors, use shielded cable, use ferrites, stabilize voltage
 
 ⚠ Red wire from sensor cable delivers 15v !!!
@@ -16,5 +20,5 @@ Proceed with [calibration](https://github.com/EmanuelFeru/hoverboard-firmware-ha
 
 ## Troubleshooting:
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)
-* Make sure you are using the sensor cable(left or right) selected in config.h
+* Make sure you are using the sensor cable(left=CONTROL_PWM_lEFT or right=CONTROL_PWM_RIGHT) selected in config.h
 * You might have a defective input, because of a fried resistor or MCU pin (e.g. [issue](https://github.com/EFeru/hoverboard-firmware-hack-FOC/issues/244)), you can configure the firmware to work on the other cable
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