The big box part, is called the intake plenum. Its part of the intake manifold, which is the assembly.
The throttle body is the part that bolts on to the front of the intake plenum, and has the plate inside of it that moves and lets in air when you press the gas pedal.
I'm confused on your question, so go ahead and ask it again, using those terms. The rubber connector tubes are just that, they connect the rest of the intake piping (the metal stuff) together so there is flexibility for service and engine movement.
Pics might help as well