The next two pictures show the new part in place with the filament pins and flexed. The addition of the new hole and pin essentially locks the tip into a non-flexed position.
The next picture shows the finger in flexed position with the new pin removed and the finger tip part manually flexed. It appears that the finger tip would need to pivot around the new hole location and the relative location of the actuator end would have to shorten in relation to that pivot location.
The next two pictures are taken from the other side in order to show the location of all the pins.
I tried to fit together the part with the new hole and the other parts in as many ways as I could but the way it is shown here was the only one that allowed all the holes to match that I could find.