Yes that helps a lot. It almost worked right as you wrote it, but this way also the values of the checkboxes are changed, so there needs to be one minor change.
CHANGE
$(".acf-field-123456789abc label").each(function(i){
TO
$(".acf-field-123456789abc .acf-label label").each(function(i){
Then it works like a charm.
Thnq.
