[DG] [DG11] splice Seatalk to NMEA?

[Pat T]

I added an Axiom MFD to my helm station to replace an old Navcenter in the main cabin. I installed the Axiom while the Navcenter was still in place. I want to now remove the Navcenter but when I disconnected the cables ( NMEA and Seatalk) from the rear of the Navcenter the other gauges at my helm (speed,wind,depth) went dead. Apparently the data and or power goes through the Navcenter to my other gauges, even though there is no power to the Navcenter. I am guessing I should be able to splice these 2 cables together and then be free to remove the Navcenter? But the NMEA is a 5 wire connector and if I remember the Seatalk is 3 wires. How would I do this? I have not removed the outer black casing of the cables so I can't tell you any colors