Validation for Flex fields through Autocomplete Rules

Validation through autocomplete rules for defaulting he DFF's at the Employment page, the particular values needs to be retrieved from the locations page
At the Employment page, and location page two flex fields are configured as Customer Name and Customer Account Number, When a location is chosen, the default values for the flex fields should be populated with the corresponding data retrieved from the locations.

for example: location page-location name:NEWYORK-1234 , Flex field-1 :XYZ and Flexfield-2 :3456
when we choose work location in the employment page with the location name NEWYORK -1234, the two flex fields should populate automatically as the above