Freecad and Snapmaker 3rd party configs

Am trying to get Snapmaker and FreedCAD to talk to each other. So have downloaded the 3rd party Config files. The very sparse Readme simply states

  1. Select the alt pathPath workbenches and click ![alt tool]tool manager

I am on a Mac so although it states similar set up as Win, this to me makes no sense as to what you are supposed to do , or where. Is it adding a workbench / tool / add-on / printer or other? Does any one know of any better setup instructions that maybe tell you where to start looking inside FreeCAD (on a MAC) to load these Config files please? Thanks in advance.