HP -01 Owner's Manual page 81

4. To reconnect the band, align the two links, and slide them
halfway together.
5. Depress the connector pin carefully, and align the slot in the
center position. When you remove the pointed tool, the connec-
tor pin will lock the link in place.
6. Make sure the links are connected securely by moving them
back and forth. Reconnect the band at the clasp.
Maintenance and Service 79