"Pro-Tow" is actually called a 1-Point release because you are only being towed from the shoulders.
If you have attachment points at the shoulders & keel it is called 2-Point.
An Eagle requires the 2-Point setup and 14" forward of where the zipper starts sounds correct.
The primary release should disconnect at the upper (keel) attachment point.
If you have a primary failure, followed by a secondary release & wrap, you will get dragged around by your nose.
The only way to avoid this, that I've been able to figure out, is to use a weak link on the primary that is lighter than recommended so it will blow if all the towing tension is applied to it.
My primary is a modified Russian mouth release & my secondary is a standard straight pin.
Here is me testing an Eagle with the above system.
This is my recommendation for an "out of the box" primary release.
Preflight your release EVERY time.
Failure to do so may kill you.
Daedalus, Hyner, Mountaineer & Capital Clubs also the Ohio Flyers.