underdash

Hello everyone I have some questions about the first gen keyless entry. I've done lots of research with explorers and f-150's on how to program the keyless entry. But I've had some mixed information some say the module is under the dash other say it's in the jack compartment in the hatch. Mine...

I've searched and searched under the dash and I can't find the connector where to plug my brake controller into. I have the factory installed Class III towing package. Any help in locating would be appreciated.