Question: 

How does the Companion install?

Answer: 

One of the reasons the Companion is so innovative is because the mounting system is beneath the bed of the truck, mounted to the frame.  This mounting system includes a four-inch hole in the bed. The Companion base has a square post that fits into this hole.

After the Companion base is set into the mounting hole, a lever in the wheelwell is turned, engaging a pin through the post.  A draw-down bolt on top of the post creates upward pressure on the pin.   A locking bracket holds the bolt in place.  

The last step is locking the coupler portion of the hitch on top of the base.