Taxus812,

You will not get an indigestion from this even if you bite .

Think of an ordinary snap like often seen on parkas, jackets, lady's dresses.
Available in many sizes. You snap it in and snap it out with a light force.
The direction of that force is obvious.
Now if you apply a force at 90 degrees to the snap in - snap out force the snap will not unsnap, wil not come out.

Simply use your imagination how you install the snaps on your model.
I have used both orientation ___struts snap in downward and upward.
Can also be upward at one end and downward at the other end.

Just use snaps of appropriate size for the size of he model and the size of the struts.

Zor