For your 2007 Mitsubishi Endeavor you would need the Curt hitch part # 13113 which is confirmed fit.
I have attached an install video for the # 13113 hitch which will walk you through the install process.
If you wanted to do some towing, you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and... view full answer...