Integration of a custom command

I installed unrar to extract rar files and the command is: unrar x "sorce" "destination".

To untar a archive you need to use: tar -xvzf "source" "destination".
The predefined custom command in the preferences menu is tar -xz --directory="!?&Extract to directory:?.!" -f "!"

I do not know about the variables that have to be used here:

How can i integrate the unrar command that it can remotely extract rar files ?

Try

THX. :)
Seems to be working!

Reporting when having errors!

martin wrote:

Try

unrar x "!" "!?&Extract to directory:?.!"