Cable connections for Lowrance X125 and X126DF, March 25, 2004 Sockets with blue socket nuts, and cable plugs with blue locking collars are NMEA 2000 connection types. However, the X125 and X126DF do not have a NMEA 2000 network socket or a communications port. These units cannot connect to a NMEA 2000 network and cannot transmit NMEA 0183 data. The NMEA 0183 data cable, the NMEA 2000 power cable and the white speaker wire are unused and should be capped with wire nuts or electrical tape. Sonar unit rear view SONAR PWR/DATA Sonar socket Blue Power/Data socket NMEA 0183 Data Cable. Four wires: blue, orange, yellow, shield (bare). Cable label says "RS-232 COMM." SP-BL speed sensor. This is packed with the X126DF and is optional for the X125. Gray NMEA 2000 Power Cable. Three wires: red, black, shield (bare). Cable label says "NMEA 2000 Power." Blue Main Power Supply Cable. Cable has no label, but is thickest of the three. Three wires red (+), black (­ ground), white. White is external speaker wire, not used in these units. Skimmer transducer with built-in temp sensor This figure corrects the drawings on pages 21 and 25 in the X125/X126DF manual, part 988-0151-171. It is a large-view supplement to the manual's Addendum I, part 988-0151-201. ...