This step is used to define the location fields for the boreholes and (very important) the primary key for these holes.
If you need to see a list of the blocks of data in the input file, click the small View Data button, shown with the blue arrow above.
The program will load the Available Fields into the pane to the right.
Be sure to map the import fields to the required fields: Name (the borehole ID), Easting (X), Northing (Y), Elevation (Z), and Total Depth.
! Not sure what's what? Click the View Table Data button to view the source data block. From there, you can click on the View Structure button to view the field definitions.