Interesting in this Wifi world is the explanation how Mimo works. Rather Dan pushing the Third antenna closely to the other (Black and white) itâ€™s in mine opinion better to place it with the end closely to the end from the HDD in de same direction. I did so and have better results then closely to the other position you mention!
For the people Who want to understand more about MIMO and N maybe this is a good explanation.
Thanks @ TheRing
Grtz, from Maastricht (The Netherlands)