Was able make some more good progress this weekend.
I went down to Lowe's to take a look around and found patio door locks that looked promising as prop rod locks. Came home to take a look at where I wanted the prop rods to fit into the foam. As it turned out the electrical boxes were in the perfect spot.

- Box
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So rather than install another hard point I decided to dual use the boxes. I was just going to use a cover plate on the boxes so I decided to drill a hole in the corners of each cover.

- Drilling
- DSCF4409.JPG (171.87 KiB) Viewed 18147 times
And when done it looks like this.

- Hole
- DSCF4404.JPG (137 KiB) Viewed 18147 times