international

I see 3 video in (use farka cable) from ports 6 and 7. I'm using a port from 6 for reverse camera and it's working fine. Now I want to connect a camera 360 degree (bird view) system and wondering if I could use the other port that still empty from 6 or the port from 7 (however I think the port from 7 would not be good because it might only show black and white picture). Does anyone know if it's possible or not? Thank you very much