From Teletraan I: The Transformers Wiki

The Space bridge nexus is a structure is in the Animated continuity families.

The Space bridge nexus was a series of space bridges that served as a central transit route throughout the network of space bridges. One of which was located on Cybertron. So it kind of serves as a train station...

Fiction

Animated cartoon

Longarm assured Ultra Magnus that the Cybertron Space Bridge Nexus was guarded from Decepticon incursions. TransWarped