The cover on the trunk lid just pops off. I had to remove mine on my WRX when I added a spoiler. I would think the trunk release cable in your problem. The little plastic holders aren't very good. A few zip ties would probably fix it up for you.
AEM CAI, Perrin ELH wrapped, Catted Downpipe, Stage II XPT tune, K4RT30Y STS, lip, shark fin