You replied, when I still was editing the post ... please read above again
If it are really scrolls, it's simply a note book ... and indirectly it says, write anything of importance in this book, that you don't forget to act accordingly.
Well, the point is the year ... if 1467, then it's addressed to a very young man still in education, if it's from the time of 1494 or later the use of German motti might refer to actions, which happened between Lodovico and young Roman king Maximilian. They had "bill's" with each other. They had contracts, which shouldn't be forgotten.
This "Rait" might have been an expression used in Bavaria, as the Grimm indicates, and so it might belong to expressions common to Maximilian (Austria not far from Bavaria). Using this German motti might be a way of Lodovico to remind Maximilian on earlier promises. In these early years of Maximilian's reign the young king of the empire got more money from Lodovico Sforza than from anybody else.
If it are scrolls, then it are double scrolls - so it seems to indicate "diplomatic contracts". Two sides have signed, and both are bound by a chain to fulfill, what is written. So "don't forget the contract" is the meaning of "hic verges nit" - not in Latin, but "half Latin, half German", so that's clear, that this a German-Italian contract.
The "1467" is somewhat disturbing. It would be interesting to know, when the symbol with motto was used for the first time.