Thanks M.
N̶o̶,̶ ̶t̶h̶e̶r̶e̶ ̶i̶s̶ ̶n̶o̶ ̶b̶u̶i̶l̶t̶-̶i̶n̶ ̶a̶n̶t̶e̶n̶n̶a̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶m̶o̶d̶u̶l̶e̶.̶
Edit: Well, there are 2 female plugs for antennas, and luckily I do have the proper antennas.

Look at picture in next post.
Well, I don't have a solid idea how I'm going to do it, but I'd like to. As I have mentioned somewhere earlier, there is a guy who did for Bluetooth
here.
So those 7 prongs are for grounding connected to the backplate? Oh, I put a piece of paper behind the backplate, as a precautionary measure not to touch the internals and motherboard's juicy electronic stuff (including those J15-J21

)
But, TBH, I highly recommend removing the mid-frame for every DX owner, it makes lots of difference in terms of weight. I don't know why Amazon (Lab126) jammed this thick mid-frame in there (picture attached). I can now effortlessly pick up and hold just with 1 hand.
Damn, some pedant people even would be happy even with 18 screws less meat (well, metal in this case) on this baby!