When I am making healthy zucchini bread with applesauce I find that the right balance of moisture comes from leaving the zucchini water in the recipe! I will even add in up to 3 tbsp of unsweetened vanilla almond milk before baking to ensure it has the perfect moist texture. That being said, if you notice that your zucchini has a lot of moisture and you are worried about how to keep the bread from getting soggy in the middle you may choose to wring out some of the moisture prior to mixing.