Launch the Princess Leia bird at a roughly 45 degree angle. You want to get the most length of this shot to be able to bypass the height of the center house.
Power Activation Point
The exact location of your power tap can vary for this stage. In general just activate the power once you pass the house. Your goal is to pull out the wooden pieces shown in the picture.
First Shot Result
The wooden pieces pulled by Princess Leia and herself will land on the pieces to the right. The falling pieces kill the center snow pile and the pig. The metals then slide down to trigger the TNT, which kills all the pigs. You will then be awarded with the three star mastery rating.