The first thing to remember is that FileMaker can not import from another FileMaker file in a server-side script. So the steps are:
- in the source file/table, create the found set of records that you want to push to the other table
- export it to TAB or Merge format, use the Documents folder as the export destination
- navigate to the destination file/table, import from that file in the Documents folder
Make sure to use only server-compatible script steps (use the compatibility view on the top right corner of the script editor).