It looks to me like a tiny rectangle just below the dome, and a perfect fit for the close-up you posted. Take a look (and maybe crank up the brightness on your monitor, which'll make these details easier to differentiate):
The Vengeance bridge was a redress of the Enterprise's, giving us an idea of the size of the ship compared to that window.
It's also worth pointing out that the VFX in Star Wars and Star Trek Into Darkness were done by the same company, Industrial Light and Magic.
Also remember that the shape of a Star Destroyer and a Trek starship are as different as it gets. One is a giant triangular thing, one is a saucer/hull/nacelles thingie with far less internal volume.