My rear trunk release cable broke at the latch and I couldn't find find the pull release. After removing the bumper, you can easily find the pull cable. You can also get you hand inside a vent just under the left taillight. I used a blue zip tie to extend the pull cable to make it easier to get in the future. I also used about $2 in local hardware store parts to refasten the cable end. easier and cheaper than a replacement cable. Here are some pics.
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