Pg 599 shows when you can not open the trunk, to open this little cover. Take that emergency key from the FOB remote and turn the key thing under that covewr, but they do not tell you where to find that FREAKIN cover and I can not for the life of me find it.

It ain't in the trunk, remember the issue is, "YOU CAN'T OPEN THE TRUNK," LOL

 

Look on the inside drivers door or the console for it.

 

OK, I Googled it. It is weirdly placed right behind the head of the drivers side rear seat.

https://getjerry.com/car-repair/what-to-do-if-your-honda-accord-trunk-wont-open