If you're printing multiple models with it set to "All at once" then they are irrelevant. The Printhead Settings were measured by me with a pair of calipers, but these are only important if you're printing multiple models with the "Print Sequence" set to "One at a time". For the A150 they are 160mm, 160mm and 145mm. For the A250, those dimensions are 230mm, 250mm and 235mm. For the A350, the X, Y and Z dimensiuons are 320mm, 350mm and 330mm respectively. Here are the machine settings for Cura 4.8 for the Snapmaker 2.0 A350.
SNAPMAKER 3D PRINT FILES ARCHIVE
This is my archive of files for the Snapmaker 2.0 A350.