Oh, do understand that, so if you were on the opposite side of the black hole you would see the same as we do? Or is it not possible to be the other side?
In the Universe massive objects become spherical at a certain point of mass. (I'm sure they have a name for that point).
Black holes are spherical singularities of mass. The 'Light' event horizon is also spherical. No matter which way you look at a black hole you will see no light.
Matter coalesces at different rates on spherical masses. That is why planets and moons rotate. The unequal collisions of matter to the sphere causes it to spin. Black hole singularities spin too. Thus if it spins, it has a top and bottom.
Science has seen that black holes have gamma jets of energy being ejected from their poles. If you attempted to look at a black hole pole end, you wouldn't see anything, you would be fried.
Sagittarius A black hole gobbles up the matter from the Milky Way. The matter is spiral and kinda flat for a reason. The matter at its poles has been blown away by its enormous jets. All that remains is the matter caught in its gravitational influence at its equator.
There is a bar of density at the center of our galaxy.
That is currently the area of the singularity where the mass is highest.
That bar is spinning, where the bar ends and the spiral begins is a point of event horizon that is its 'matter' event horizon. The horizon at which matter is influenced by the singularity.
That is why it looks like a right angle to the spiral.
Its where matter is being pulled by gravity directly towards the singularity.
Light is not yet captured so we can still see it.