Upgrade the firmware on ATmega16U2 (Due)

Hi!

Step 4 in the tutorial (http://arduino.cc/en/Hacking/Upgrading16U2Due) says: Connect a 10uF (micro Farad) capacitor between the GND and RESET pin. But I dont know if it should be at the ATmega16U2 on the Due itself or on the usual pins or on the other arduino used an AVR-ISP (in my case an Uno).

I don't know if this is a stupid question but I do not want to take any risk...

Could anyone help my with this?

Best regards / Christoffer

I've have now tried with to hook up the capacitor to GND and RESET on ATmega16U2 and made an attempt but I get the following error when i run the complete line:

(My computer is runnning Windows 7)

C:\arduino-1.5.2\hardware\tools>avrdude.exe -C avrdude.conf -c arduino -P /dev/
tyACM0 -b 19200 -p m16u2 -vvv -U flash:w:/home/USER/newFirmware/16u2.hex:i 



avrdude.exe: Version 5.10, compiled on Jan 19 2010 at 10:45:23
             Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
             Copyright (c) 2007-2009 Joerg Wunsch

             System wide configuration file is "avrdude.conf"
avrdude.exe: can't open config file "avrdude.conf": No such file or directory
avrdude.exe: error reading system wide configuration file "avrdude.conf"

So where can I find the files need? They do not seem to be included in the Arduino IDE...I've checked both 1.5.2 and 1.5.5-r2.

Could you please make make clear interconnecting 5V pins? Official manual

says it should be connected, while ArduinoISP code comments says that they shouldn't.

If i did connect Uno's 5V to Due 5V ICSP how it is possible to make sure I irreversibly killed my Due?

To whom it may concern; in recent 1.6.8 IDE default paths were changed
avrdude.exe - C:\Program Files\Arduino\hardware\tools\avr\bin
avrdude.conf - C:\Program Files\Arduino\hardware\tools\avr\etc
16u2 firmware - C:\Users<username>\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.4\firmwares\atmega16u2