Is this compatible with the wido?

How big are the holes? I assume they are at 0.1" pitch.

Is the 5V connection on the right side of the shield (red plastic) connected to the same 5V connection as the bottom (red plastic third hole from the right)? And are both these connected to the 5V outlet on the Arduino when attached?

The IIC interface is based on the board, for wido (leonardo), it should be 2 (SDA), 3 (SCL). You could connect the cable with LCD screen.