Thank you, everybody.
UncleTony, thank you for the wire infos. After all, I took the option of possible variations in the colour due to different manufacturers. And painted them in black...
rhallinger, for metallic colours I use acrylic Citadel colours and rather airbrush them, trying to avoid brush touches.
For now the assembly is over, all the wires, tubes and gear I was going to add is already on.



And after test-fitting to the fuselage:



I am still contemplating if I should add some wash. The photos seem to point out it would be better with it. But in real and with natural light I really do not see the necessity to emphasize the details.