The SPX connector is a proprietary Ethernet and PoE connector developed by Starlink. It is a 20-pin connector that has 12 pins mapped to the eight wires used by Ethernet.

Used on all consumer Dishy terminals (Gen 2 square Dish, Gen 3 / Mini) and their official Ethernet+PoE adapters. This is the small “mini-HDMI-style” SPX you see on the Gen 2 adapter cable.