How to set origin point on a fixture

[parsec (FerAS)]

Here is an example

Using jig table in light burn

Hey guys/gals I was wondering if anyone has used the Roly jig table. I am thinking about getting it for engraving coasters and business cards. It looks pretty easy to set up but I was not sure how to use it in lightburn to know where to engrave the coasters the same every time. I’m pretty sure I am overlooking something so any help would be greatly appreciated.

Notice the 2 screws

I believe that @ednisley has an angle plate at a corner.