The 73 note adaptor connects the 8 pin connectors on the 73 note pipe driver to 12 pin connectors.
The 97 note adaptor connects the 8 pin connectors on the 97 note pipe driver to 12 pin connectors.
The 49 note adaptor connects the 8 pin connectors on the 49 note pipe driver to 12 pin connectors.
The keying adaptor converts the small connectors on the CS2402K to larger style connectors.