HP CC487-91209 Fax Manual page 81

6. Locate the fax accessory connector openings on the formatter. Align the connectors on the fax
accessory with the openings on the formatter, and then push down firmly.
7. Connect the fax accessory cable to the formatter.
NOTE:
ENWW
The fax accessory cable must be routed under the plastic tab on the fax accessory.
Install the fax accessory 69