Advanced Bionics Naida CI M90 Manuel D'utilisation page 55

Turn the AB logo portion of the M Listening Check 90 degrees.
Bring your hands together, sliding the AB logo portion into the portion
of the M Listening Check in your other hand. You should feel the two
portions snap into place. Once in place, the sound processor and M
Battery connectors will be exposed.
Carefully align the battery connector on the sound processor with the
battery connector on the M Listening check and connect the top of the
M Listening Check module to the sound processor.
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