JD Starfire ITC GNSS with CubeOrange

Hello
So i’ve been trying to connect an old John Deere Starfire ITC antenna to the pixhawk cube orabge with no sucess
This antenna used to work with a SF1 signal (john deere proprietary, i guess) but in 2021 that service was discontinued on this Antenna moddel. At the moment it works with EGNOS.
I can read the NMEA messages from the receiver via a RS232 output + rs232 to usb converter in my computer.
At the moment i have GGA, VTG and RMC at 38400 Baudrate
To connect it to pixhawk i bought a RS232 to TTL converter.
Tryed every type possible, changed the baudrate to match the antenna and nothing worked (NO GPS).
I know the cable works as i have the here RTK base station working via serial. (GPS1)
What am i missing?