add button to dilemma flashing guide

Author: bstiq

assets/pics/help/flashing/6.jpg

@@ -100,11 +100,17 @@ The hardware fallback is an emergency method:
 - if something went wrong while flashing
 - if you accidentally flashed a firmware for a different board
 
-For this, you will need to unscrew the case bottom and locate two through holes, either labelled "BOOT" or unlabelled.
+For this, you will need to unscrew the case bottom and locate, depending on your keyboard:
+- for the Dilemma V3/Dilemma MAX V3: a small button
+- for all other keyboards: two through holes, either labelled "BOOT" or unlabelled.
 
 ![](../assets/pics/help/flashing/1.jpg)
+![](../assets/pics/help/flashing/6.jpg)
 
-Next, unplug the USB connector, and then bridge the two pads, for example using metallic tweezers. Hold this connection while you plug in the USB connector, and release it shortly afterward.
+Next, unplug the connector and then:
+- press the button. Maintain it pressed 
+- or, bridge the two pads, for example using metallic tweezers. Hold this connection
+- plug in the USB connector, and release the button or tweezers
 
 Once you've put the keyboard in bootloader mode, you can skip to the [usb drive section](#usb-drive).