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I am not with Laminar Research; just a flight simmer.
I am not at my flight sim computer at present so I cannot give you an exact detailed answer. However what I can remember is that in the menu bar found at the top of the screen when you open up one of the listed pages there is an option of clicking one of the boxes in that page for either "cold and dark" which relates to the parking area off runway or as you seek at the end of the runway with the engines running ready to take off on the end of the runway. unfortunately you will need to trawl though the various pages.
Alternative have a look at the manual which can be found at https://x-plane.com/manuals/desktop/#flightinx-plane When you open the manual click the CTRL plus the "f" button on your keyboard It will provide a drop down menu at the top of the page. type in "cold and dark" and it will take you to the area you need (should be in Section 5.1.A) in the manual.
Hope this helps.
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