A small bracket to hold a shielded Ethernet coupler labelled as Starlink. I have a socket for my dish my Motorhome (RV) roof and one low down for when I’m using the dish away from the vehicle on an extension cable. I use this coupling to switch which socket is connected to the router. My full installation information can be found here: https://tuckstruck.net/truck-and-kit/geekery/installing-starlink-in-an-rv/