Can the selected choice within a repeatable section be used as a label?

[EmilyEB8]

Is it possible to use a value from a choice list to populate a label?
In this example, $records is a repeatable field, which contains my target child field (a choice list). Can the text from my selection be used in the place of $records?

var callback = function () { if ($region == 'NT') {SETVALUE('label', CONCAT($records + '_' + $id_code));} ON('save-record', callback);}