The cabinets are hanging on cabinet clips, also known as "French cleats", here is a link to a similar cleat. I had a cabinet company provide me with a bunch of 2' lengths. so each cabinet clips on 3 rows about 2' wide. very sturdy. then at the top of the cabinet there is a slide lock that throws a bolt into a hole. keeping the cabinets from bouncing off the clips when going down bumpy roads. so far it has worked very well.
http://www.hooksandlattice.com/heavy-duty-hangers.html?gclid=CJ3JoPGzvb8CFQmMaQod6aYAvg
The awnings are just bolted on. the one on the back was much simpler as there is a vertical surface there to just bolt right through the back plate of the trailer. the side awning was a bit more of a challenge due to the radius of the roof. I used a 1/4" thick aluminum angle with a 4" leg down and a 1 1/2" leg going the other direction. this pretty much created a flat surface to mount the awning to. then 4 long bolts go through the awning bracket, the aluminum angle and the internal frame of the trailer. keeping it horizontal to the ground when open. bit of a pain but worked out well and hell for stout.