Does anyone know if there are any URL parameters for some of the bulk processing pages? For instance "Order Items" or "Fulfill Orders" ? I would like to pass in something like ?location=10 or the like and save the URL for users - no luck in testing or searching so far

Try using the regular UI to set the location to any value and let the screen refresh. Does the URL change?

It doesn't 😞

Add &xml=T to the end of the url and see if maybe the location field has a different ID

I did try that, and it was something like bosslocation on one of the forms, but I still didn't seem to be able to pass a value to it