This is the ‘second release’ with the wire attached to the backpack. It doesn’t matter if it is the first or second release though. In some batches, factory went through the trouble to apply some glue in between the thruster and the backpack. If it is the case, you need to use a model cutting knife and gently slide though two places on both side (4 in total) to loose them up. One is between the thruster and the backpack just behind the laser sword handle, the other is above the thruster, medial to the where the wing attached. See the forum images below I borrowed from Baidu tieba user 就是喜欢玩’ a thread.
