After modeling the window of the cockpit on the back and one more plate. All the parts I needed were finished:
Assembling the snowspeeder
Before starting with the assembly I grouped the bricks and studs together. Assembling was mostly done from the top view. Just like before I just the snap tool a lot to get the pieces in the right place. Since I was trying to model this as fast as possible, I didn't model the underside and didn't put much detail in the back of the ship.
Using the move tool, I copied the bricks for the bottom part of the wing and the parts on top of that.