Tubular Space Frame?, How would you do it? Options

[plymouth37]

So I have been playing with the idea of adding a couple more tubes to the back of the Anklebiter. If you were to replace the back half of a 914 with tubes where would you put them? Here is a rendering of the original cage (red), drivetrain (Grey), and points that need to be tied in (green).
What would you do?

[Rand]

My Qs are in blue. You already have the crosses to the tranny points done so those are redundant for this conversation.

Inside the blue circle... Why would you go up there? To me, the strong point to tie into is the tip of the blue arrow as that's what ties forward. I would ignore anything above it.

So top of shock tower forward to that point (my blue bar) is the strongest and most important piece in my mind.

Outer suspension point is strong by default. Inner ear needs some bracing. Doesn't make a huge difference where you go with it, I just put a blue bar to the strongest point in my thinking. Your green bar that goes lower is fine. Or just use Chris's kit (Tangerine).

Given that weight is important in your build, I just want to see you only add bracing where it's most effective, and not where it's really superfluous.