The extra 40 lines are all tied to ground. The cable was constructed from 10 pieces of Cat5e with one line from each twisted pair going to ground. The construction is as tedious as it sounds and ...
Besides Wi-Fi and Thread connectivity ... You’ll also need to deal with the single PoE cable (either CAT5e or CAT6), which connects to the SmartWings motor on the side. The cable can be hidden ...