Hi again,
in general, the two antennas on 2.4 GHz should be as far apart as possible (most important),
then they should point in different directions (90° the optimum, to cover two polarization planes),
then, they should not be tightly bent or kinked, as to prevent damage to the strands and the shielding inside, but laid out in a more gentle arc.
This is also because kinks can affect the wave resistance, and significantly reduce the antenna gain—the higher the frequencies, the worse.
And lastly, they should stand out freely, in particular they should not be covered by metal or carbon, and they should not be laid out close to conducting materials or fluids, since that can also significantly reduce the antenna gain <- range.
At considerably close range, nothing to worry about, the farther you go, the more important.
All the (warning sign) do's and don'ts in the radio manual have their reason
But the only thing that seems to have stuck in people's minds is 90° and maybe, not below or inside a carbon canopy/fuselage.
Cheers
Eddi
Born to fly ...
forced to work.