So made a few changes to the final camera mount. The front chamber is now firmly attached to the frame using an aluminum beam rather than the original suspended using wires. It turned out that these wires couldn't support the unequal weight of the chamber and keep the chamber parallel with the rest of the frame. While this unequal weight should be resolved when I finally add the second endcap, I decided a more rigid attachment system would be better.

In the photo you can see the final attachment of the two video cables which feed the stereo cameras back to the Raspberry Pi.