Positioning of second screw
The second screw will assure that the plate is in the correct lateral position on the proximal fragment.
To achieve the correct alignment between the plate and the bone, a K-wire / Schanz screw can be used to push the proximal fragment into position. Alternatively, this can be achieved directly through a second approach, using a periosteal elevator to push the bone into position.
Then, the second cortical screw is inserted.