Setting up a correction link - Arducopter integration?

how do have connected the first GPS?
Trough UAV CAN or with serial?
I had connected my first GPS (Here 2 Antenna) at the beginning with the UAV CAN Bus and i doesn´t works.
After that i had changed the parameters and the antenna cable connected via serial (I2C) and than it works.
It seems that the Cube cannot handle two different types of connection.
Both connection setted to serial and i got two signals from GPS 1 and GPS2
GPS_TYPE2 = 5 (NMEA) wrong
GPS_TYPE2 = GPS - OK
Good luck!