What I see is two multi-wire cables one going into the socket and the other out of the socket. It would be good to see a picture of the bottom of the...
Generally, you can go up to 30 feet without needing twisted pair. Xconnect seems to be the most popular connector, but if you're talking just wiring...
I'm a bit late to the thread, and unfamiliar with the design, but that advice looks a bit fishy. The first part is an i2c memory, the second is spi....