|There is no internal command to set window position that I know of but a workaround can be achieved using unique window titles.|
The easiest way to set this up would be open up a command prompt and for each title type in:
Where title is the unique title of the job and the quotes tell the start command that title should be the window title (if start doesn't know what to start it should open a cmd window). Now either click on the icon on the top left hand corner of the new window or hit <alt>+<space> and select properties and set the window position. When you close the properties dialogue select "save properties for future windows with the same title".
You could also work out the registry setting under HKEY_users\<what ever this is for the user>\console\<window title>, but that is up to you.
Now to get it to work you will need to change your scheduled tasks so that instead of simply invoking the script you invoke it with a title(as the title command within the script won't work). To invoke it with a title start can be used:
start "title" "script"