To open this dialog box, click in the Auto Match Template, which is in the Audio tab.
It has a list of template codes you can add when you edit the template. Click one to add that code to the end of the existing template. Notice that the codes, such as {PASS}, are followed by additional information that describes the code.
The goal is to uniquely match each file name to the passage you want to associate it with. You do not need to match the entire filename.
Suppose your passage was Psalms 10:1-11 and the filename was PSA010_001-011_v1.
The Auto Match Template would be {BOOK}{CHAP}_{BEG}-{END}.
The {SECT} code is particularly useful for Render files.
For {SECT} the description matches the term that is selected as the Term for organizing layout in the Edit Audio Project Settings dialog box.
So, {SECT} could match the Section/Set number and link it to the set in a flat layout. The rest of the file name does not need to be matched because the number at the beginning uniquely links each file to the corresponding set.