How do i add a custom field and map it to HR Feed?

Hello Experts,

So i have a need to add a field to identify employees that are considered "REMOTE".  Currently we don't have a way to identify them.  We receive a field in our HR feed that identifies them as 1=Yes, 0=No for remote user.  This field is currently not mapped with Person Table.  I need help adding/Mapping this field in the sync.Editor.  Any and all help will be greatly appreciated.

we use version 8.0.1.

Thank you in advance for your guidance.