Sure, no problem. The rear awning - included with every Spaceships campervan in Australia - provides extra ventilation on warm Aussie nights. It is super easy to set up. Check it out.
Pull out the extension bars at the back of the campervan. The same bars you use to create the cooking area at the back.
Put the board and the mattress on the bars and set up the rear awning as shown in the video below.
Open the tailgate / boot / trunk of the campervan and grab the rear awning
Remove the awning from its bag and put the awning on to of the trunk door
Secure the awning by hooking the elastic cords onto the hooks near the wheelbase.