Remove dough from refrigerator and divide in half. Cover and refrigerate the remaing half.
Roll our the dough on a floured surface into a large square about 12 x 12 inches. It will be about 1/2 inch thick, but do not worry about it.
Spread the chocolate filling on the dough leaving about 1" border with no filling.
Brush dough with a little bit of water so it will hold tight.
Roll the dough - jelly roll style - into a long tight log.
Using a bread knife cut the dough in half horizontally. Separate so each cut side is facing upwards.
Braid the two pieces keeping the cut side facing upwards to give a pretty striped top on the babka. Pinch the ends together. Place in prepared loaf pans.
Repeat the process with the other piece of dough.
Cover pans with a moist tea towel and let rise for 1 ½ - 2 hour.
Bake the babkas for 35 minutes or until a toothpick comes out clean or you have a hollow sound when you tap the bottom.
Immediately brush each babka with the syrup. Use it all since it will absorb it and be moist.