Subsystem targeting mod

[pref]

Is it possible to mod how prev/next subsystem targeting bind works, or that happens on engine level?

I'd like to change it so that the targeting order is defined by the proximity to the point where the aim line defined by the crosshair first intersects the target geometry.
If there is no intersection then just do what it currently does.

If i get it right it just currently sorts the elements based on distance to that "aim line", though this logic makes no sense to me on any level so please correct me if i'm wrong.

Any hints on where to look for this would be appreciated!