We're going to skip to the main course because space is tight. What you're looking at here is the driver-side rearmost front crossmember mount. This is where the lower A-arm bolts up, as well as where the rear of the front differential is attached to the frame. In this photo, the metal bracket has been marked with a silver pencil. This is where the Calmini kit requires that installers cut out a small piece to allow fitment of the new dropped crossmember. This is the only major "can't-go-back" portion of the Calmini kit.