Are preganglionic sympathetic fibers shortcircuited together?

All of them? Some of them? None of them? Looking at many drawings it often looks as if they are.

Image from Wikipedia.
https://upload.wikimedia.org/wikipedia/commons/f/fd/1501_Connections_of_the_Sympathetic_Nervous_System.jpg

Here it looks like T1-T5 are shortcircuited.

It would mean an action potential on anyone of T1  to T5 would have the same effect. It wouldn't matter if T1 was activated or T5 was activated. The effect would be the same. Everything in the picture except kidney, bladder and gonads would get sympathetic input. It doesn't seem to make sense for the sympathetic nervous system to be so undiscriminating.

For example it can't give sympathetic input to the heart alone, without giving it to a shitload of other organs as well.




Is that how it works?

Action potentials are all or nothing. No attenuations. It's not like a signal at T1 would be weakened having traveled down to T5.