Refilling coolant on a system with cap below high point

Is this system on a Pipistrel?

I am intersted in how/where the overflow reservoir is connected in to this system - photo/drawing?

Sean raises a good question.  The installation manual has some limitations that have to be followed.  The drawing provided is difficult to work with as we do not have reference to the relationship to the engine itself.  

Perhaps a comparison drawing to see how it relates to the Rotax requirements would help.

Cheers