Two more wires to connect.
GP1971F
White wire (Output +)
Blue wire (Output -)
FCV628
Yellow wire (Input +)
Green wire (Input -)
The Connection is White and Blue from the GP1971F cable. Yellow and green is from the FCV628 cable.
On the GP1971F set the SETTINGs, INTERFACE SETTINGS, NMEA0183 OUTPUT, turn ON GGA, RMB, RMC, VTG, and ZDA.