My Endeavor came with the Tow Prep/Full size spare package. I'm ordering the hitch assembly and wiring harness and need to know where the factory stashed the trailer pre-wire.

 

The wires are under the driverside cargo area floor. You need to remove the tie down hooks to be able to remove the floor and you will see the wires. BTW Mitsubishi did a recall on the wiring harness that plugs into it so make sure you get the new one or buy a universal kit. (i did)
good luck
CGEkY

 

Thanks man.

Funny, hours after I read your post, my order arrived from Mitsu with the hitch and harness. The harness directions showed the location of the wiring, exactly where you said it would be. I verified with Mitsu that this is the new harness when it was ordered.