EVAL-ADAU1466Z schematic

I need information about the EVAL-ADAU1466Z. In this evaluation board schematic (UG-1135 rev. 0 available on the site) there are some port hanging.
Two are OP_AMP_REF1 and OP_AMP_REF2 (pag. 33-34) connected to the ADA4841. Another one is FILTR connected to the AD1938.
This ports are not connected with anything else in the schematic and are undocumented in the guide or other datasheets.

Thank you for your help.