This is for the 09-13 models, but you may be able to do something similar, if not identical.
www.subaruforester.org

('09-'13) - 2012 - DIY ► Rear Hatch Interior...
I like to sleep in my foz. As you may know there is not a way to open the rear hatch door if the battery dies unless you push a small triangular tab to the right an inch or so. But since I have a raised platform in the boot at all times this is impossible, the small door that opens giving you...