You have to remove the side trunk panel and the mount is located in the upper area right behind the back of the seat.\
To remove the trunk panel, you need to first remove the trunk mat, then rear plastic panel in the trunk which is also held in by clips. Remove the 2 hooks which hold the cargo net on that side and then remove some plastic clips which are pretty visable. After these steps, you will have to remove the trunk side panel from the bottom side first, then push it in towards the center area. Once thats done, the panel should easily come out. Once removed, if you look at the upper corner by the back of the seat, you will see a foam pad on each side. Remove the pad and you will find the upper mount.