Final answer:
Motor neuron axons enter the sympathetic chain via white rami communicates before synapsing and traveling to their targets through gray rami communicates.
Step-by-step explanation:
The axons of motor neurons in the spinal cord travel out of the ventral root and enter the sympathetic chain via the white rami communication. These myelinated structures provide a short connection from the sympathetic chain ganglion to the spinal nerve containing the preganglionic sympathetic fiber. After synapsing in the sympathetic chain ganglion, the postganglionic axons then travel to their target effectors (organs, tissues, or glands) through the gray rami communicates, which are unmyelinated axons.