Yes, there are places all over the text where he describes one of the options for the ligadure (in fact in their definition in the prologue) as "binding the arm". This binding, accompanied by other statements such as "don't bother trying to get away from me" or "I will hold you here to suffer more" pretty clearly indicate a hold as one of the options.
This is available in any of the translations, including the quite readily available two or three translations of the Pissani-Dossi text on line.
We must be take care in making any general statements about the techniques, and we must derive our knowledge and understanding of them directly from the text. To say they always went in to kill and maim does not take into consideration a study of the culture of the time, nor the specific instructions and options laid out in the primary text.
And, every master may have significantly different approaches. Even among the German masters, the idea of which blow is best, how a guard is executed, etc. differ significantly.
And finally Tony, I'm really glad that you asked the question that should be asked concerning anything having to do with WMA - "What does the text say?" If the instructor cannot answer that question and quote the text, then they must admit it is an interpretation. If they haven't read the text then they are most likely just making it up

