@javensbukan that fat connector on the right hand side is an old fashioned Ethernet connector. Back when these were made you had to plug a separate Ethernet transceiver into your device and the transceiver would have the actual connection to the wiring. That included the possibility of using a vampire tap which pierced the plastic exterior of the cable to make a connection. https://en.wikipedia.org/wiki/Vampire_tap retro tech can be so very odd.