It's strange, your X5 adapter looks different from the one in #5? The screw can not be separated from the adapter. Where did you buy it? Contact the seller.
See my post here: http://forum.dji.com/thread-55499-1-1.htmlIt shows my setup.
To mount the mic you will probably need to buy some accessories. it should still work with the quick release mic bit. I would also advise buying the one that gives you 2 accesories screw ports