First, you need to work on your CAD skills a bit to get a cleaner drawing to work with. Once that's squared away, here's how I would do it. Example pics from V-Carve Pro. I also attached a clean drawing with the appropriate layers to do what I did.
Create a square to remove all the material at the depth of the highest part, in this case the straight 1/4" wide straight pieces on the side and top. I called this layer Bracket.
Create another square to cut down to the depth of the first scroll, inside the frame that we cut on the previous layer. I called this layer Scroll Face.
Create another layer for the first scroll. The scroll will be an island inside another square, because we're removing the material around the scroll. This layer is Scroll 1.
Create another layer for the second scroll. Since you don't want to cut away the first scroll, this layer is a combination of both scrolls. The previous layer cut to the face of the second scroll, which this layer will pocket around. This Layer is Scroll 2.
Create another layer for the square holes. You can either cut the perimeter of the holes, or pocket them. I pocketed them in the pic to make them more visible. This Layer is Square Holes
Finally, Create a layer with the perimeter of the object on it, to cut out from your stock. I called this Perimeter.
I let V-Carve offset all the toolpaths, so they cut to the lines rather than along them. You'll have to have SheetCAM offset them as well. Another option is to do the offsets in the drawing, but if SheetCAM will do them, it's easier to do it there.
For specific SheetCAM questions, ask either in the SheetCAM section here, or on the SheetCAM forum. Les should get you going pretty quick.