I would bet that the low volt wires, some for the phone, some for speakers are not spliced in the panel. They are probably snaked into the main building through one of the PVCs heading underground.
Being PVC it would have been a simple mater to reroute the PVC outside the panel.
Unless....they snaked the low volt in a pipe with line volt. Say with the panel feeders....
What's with the white, black, green THHNs in a cord cap.
I especially like the use of a standard receptacle plate on a wet location box, always a stylish choice.