Thank you friends.
I've been "on-call" on my work, and they are not giving a break. Not until now I can give more updates.
I always had troubles with the fuselage antenna, so I've decided put it from the beginning making it larger to have a better grip from the inside (I hope).
And here is the piece. No troubles so far. Very good design by Luckaz.
This part of the internal structure is at the same time part of the aft wheel. There is also place for the brake hook used on carriers.