Renishaw ATOM Installation Manual page 18

Approved ESD precautions must be followed at all times during readhead electrical connection.
NOTE: The FPC cable must be connected before fitting the readhead lid. The lid is secured by the readhead mounting screws.
Inserting the FPC cable
1. Ensure the locking lever is up (open) before fully inserting the FPC cable into the connector.
2. Applying pressure to the whole locking lever, push it down to lock the FPC cable in place.
3. When the system has been connected, proceed
18 ATOM rotary encoder system
CAUTION: Check the correct orientation of the cable before
inserting into the connector. The readhead will be shipped with
the connector in the open position.
CAUTION: Do not push the locking lever down if no FPC cable
is inserted as this will damage the locking mechanism.
with 'Readhead mounting and alignment' on page 28 and 'System calibration' on page 34.