Journal Ref2 field : AP credit note

Hi,

Have noticed that in the Account Balance for Business Partner; Ref2 field is not being filled in the Journal when there is an AP Credit Note; when in actual fact this field is being filled in the AP Credit note Supplier Ref field.

Any ideas where I should include my Ref2 Comments in the ap credit note? so that when the journal is created it picks up that field as well?

Thanks.