Sweeet Pea has an 18' A & E Awning installed on her curb side. (Model # 838000D006)
The Lower Rear Bracket is located 3/4" behind the butane door, and is 8 1/2" up from the bottom if you hang your tape on the underside body edge and follow the curve up.
The Lower Front Bracket is located 1/2" behind the front body seam, 9 1/2 " up from the bottom if you hang your tape on the underside body edge and follow the curve up.
The Top Rear Bracket is located 1 1/2" behind the Gutter.
The Top Front Bracket is located 1/4" behind the Front Body Seam.
The clamp that holds the tarp to the coach is located right above the rain gutter. The bolt flange is trimmed off to clear the rear clearance light.
There's a little roller bolted to the top corner of the door to keep it from tearing the fabric.

Here's some pictures that oughta help too.

Lower Front

Upper Front

Lower Rear

Upper Rear

Over Upper Rear

Top

Over Upper Front

Door Roller

Upper Front Detail

Lower Front Detail

Upper Rear Detail