How to adjust 9975 that is not retracting the latch bolt all the way?

There are two screws on the center case that adjust the finger on the device to activates the mortise lock. Loosen the two screws and move the finger towards the end case. This will make the mortise lock latch bolt to retract all the way in. See step 9 on page 5 of attached installation instructions:  98/9975 Mortise device Instructions

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