where is the keyless remote entry module located?

It looks like the module for the keyless system is on the rear shelf, check out the images (below). Let us know if you need anything else.

Thank you so much, how do I remove the rear trim?

*Rear shelf I mean.

It looks like the image is upside down. I would open the trunk and look under the rear shelf. If not the rear seat, bottom and top will need to be removed and then the self cover to get to it. let me know how it goes.