Assigning shifts to employees in HCM

We have defined 14 different shifts via Setup > Employee > Shift, but we do not have the Shift field available to us in the People > Employee Information > Job & Pay History > Location History page, which is where I understand we should be able to select a shift for each of the employees. Should the shift field appear on that page by default, or do we need to enable certain options so that the field appears, or must the page be modified/customized so that the field appears? Any guidance that someone can provide would be greatly appreciated.