I have a ratheon rn300 does anyone no how to wire it up to the antenna as it has only gt a short piece of cable atatched 2ft to the antenna five wires are showing 1 of each red yellow green brown and one bare wire the sounder itself has a coax fitting and a 3pin seatalk along with the power cable tried various places for a replacement cable but evryone wants to sell me new gps or new antennas this i cant aford please help thankyou
