Please follow the instructions below to mount the Extension Ring on a port.1. Confirm that the extension ring is unlocked,with the locking device pointing upwards asshown.2. Align the "I" mark on the extension ring withthe WHITE dot on the port. Then gently pushthe extension ring towards the port until itcannot go in any further3. Turn the extension ring clockwise until thewhite dot on the extension ring aligns withthe white dot on the port.1

Nauticam 36052 Instruction Manual