Backside
[Linked Image from live.staticflickr.com]
Angle shot
[Linked Image from live.staticflickr.com]

The lower crossbar is 3/8, and happened to be where the bottom plate frame would run, so I just ran it long under the stirrup.
The upper crossbar is 1/2, and runs from the intersection of the hitch tongue and the two L supports. The L supports and crossbars are there because I wasn't sure the plate with the lights in it could support me without twisting. If you used a thicker plate and wanted a cleaner look, you could delete them. You could also run the supports directly into the back of the stirrup rather than under if you wanted. Lots of variations here.

Because the 2nd crossbar is behind the L supports, it moved the whole thing out 1/2" when it hit the end of the receiver tube and now you could see the crossbars in the gap at the bumper (cool) and the back of the lights and mess of wiring (not so cool) so that's when I decided to add the strap behind the top and down the sides. So mostly a valence panel but it also adds stiffness to the plate.