The side connector is a 10 pin Hirose, Part number H2868-ND at http://www.digikey.com/ The proper mating connector housing is a Hirose DF11-10DS-2C. Typical sockets include Hirose DF11-2428SC (application and wire-gauge dependant). All available at http://www.digikey.com/ ||Pin||Signal|| ||1||48V|| ||2||Power GND|| ||3||User line 1 (USB 5V)|| ||4||User line 2 (USB data-)|| ||5||RS232TX/CANH|| ||6||RS232RX/CANL|| ||7||User line 3 (USB data+)|| ||8||User line 4 (USB GND)|| ||9||Earth ground|| ||10||No Connection||